1. ECSS Software Process Model Implementation Examples
SD-MA-AI-0006, Issue 4
APPENDIX A
ECSS Software Process Model
Implementation Examples

2. ECSS Software Process Model Implementation Examples
Satellites
Software Process
A-2
Ground Software
Processes
Satellite
Space Segment Software
System Processes
Implementation
Samples
Satellite Software
Products
Life Cycle Processes
Independent Software
V & V

3. Satellites Software Processes
The
System SW Primary
Life Cycle Process
Satellite
Space Segment Software
System Processes
The System Software
Supporting Process
Satellite Software
Products
Life Cycle Processes
The System Software
Organisational
Processes
Independent Software
V & V

4. Satellites Software Processes
External References
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
External Outputs (EO)
Perspective: ALL
Parent: Satellite SW Life Cycle Processes
Activity Satellite Software Processes
Diagram: IMP-SS-000
Space Segment Requirements
Satellite
Software System
Life-cycle Process
SS-100
Space Segment Constraints
ECSS SW Artifacts
Software Product Releases
Qualified Satellite SW
SW Products Requirements
Independently Determined Process & Software Problems
CUSTOMER / SATELLITE SUPPLIER
Satellite
Software IV&V
Process
SS-300
Verified ECSS SW Artifacts
Space Segment Requirements
SW Products Requirements
SW Products
Artifacts
Independently
Determined Process & Software Problems
SATELLITE SUPPLIER
SW IV&V SUPPLIER
Software Products
Life-cycle Processes
SS-200
ECSS SW Artifacts
SW Products Requirements
Software Product Releases
SATELLITE SUPPLIER
SW SUPPLIERS

5. Satellites Software - Software System Life Cycle Processes
External References
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
External Outputs (EO)
Perspective: ALL
Parent: Satellite Software Processes
Activity: Satellite Software System LC Process
Diagram: IMP-SS-100
Space Segment Constraints
Qualified Satellite SW
Space Segment Requirements
Satellite
Software System
Primary Life Cycle Processes
SS-110
ECSS SW Artifacts
SW Products Requirements
Software Product Releases T
CUSTOMER / SATELLITE SUPPLIER
Independently Determined Process & Software Problems
Satellite
Software System
Supporting Life Cycle Processes
SS-120 T
CUSTOMER / SATELLITE SUPPLIER
Satellite
Software System
Organizational Life Cycle Processes
SS-130 T
CUSTOMER / SATELLITE SUPPLIER

6. Satellites Software System Primary Life Cycle Processes
External References
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
External Outputs (EO)
Perspective: ALL
Parent: Satellite SW System LC Processes
Activity: SW System Primary LC Process
Diagram: IMP-SS-110
Space Segment Requirements
Software Product Releases
Satellite System
Acquisition Process
IMP-SS-111
[PLC-1 / T]
DJF, DDF, TS, RB, IRD, ICD
Negotiated SATELLITE Contract
Satellite System
Software Engineering Process
IMP-SS-114
[PLC-4 / T]
Space Segment Constraints
CUSTOMER
Satellite System
Supply Processes
IMP-SS-112
[PLC-2 / T]
Independently Determined
Process & Software
Problems
Space Segment
Reusable
Facilities & DBs
SATELLITE SUPPLIER
ITT/RFQ
Proposal
SATELLITE SUPPLIER
Space Segment Reusable
Facilities & DBs
Satellite
Software Operations Engineering Process
IMP-SS-113 [PLC-3]
Maintenabilty Requirements
Maintenance Plan
Operational Plan
Operational Requirements
Satellite Software Maintenance and Migration
IMP-SS-115 [PLC-5]
SATELLITE SUPPLIER OPERATOR
CUSTOMER
Change Justification File
Space Segment Reusable
Facilities & DBs
SATELLITE SUPPLIER
SATELLITE SW MAINTAINER

7. Satellites System Acquisition Process
Perspective: Software Engineering
Parent: SW System Primary LC Process
Activity: Satellite Acquisition Process
Diagram: IMP-SS-111
Space Segment Requirements & Constraints
Initiation
EO-01
Negotiated Contract
Selected proposal
ITT/RFQ
Request for Proposal or ITT submission to
Satellite supplier(s)
IMP-SS [AP-2 / T]
Satellite System
Request for Proposal
(or ITT) preparation
IMP-SS [AP-1 / T
Submitted proposals evaluation and selection
IMP-SS [AP-3 / T]
Contract Negotiation
IMP-SS [AP-4 / T]
ITT/RFQ
ECSS-M-series
EI-01
EO-02
CUSTOMER
CUSTOMER
CUSTOMER
SATELLITE SUPPLIER / CUSTOMER
Assess Needs
for Special SW
Provisions and
SW Reuse
Process Requests
for Clarification
on SW Req.s
Request for
Clarification
on Proposal(s)
External References
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
EI-01: Supply Process: Proposal preparation and submission
External Outputs (EO)
EO-01: Supply Process: Review of the proposal
EO-02: Supply Process: Negotiation of the contract

8. Satellites Software System Supply Processes
Perspective: Software Engineering
Parent: SW System Primary LC Process
Activity: SATELLITE Supply Process
Diagram: IMP-SS-112
SATELLITE SUPPLIER
EI-01
EI-03
EI-02
Negotiated Contract
Review of the proposal request
IMP-SS [SUP-1 / T]
Proposal Preparation and submission
IMP-SS [SUP-2 / T]
Negotiation of the contract
IMP-SS [SUP-3/T]
ITT/RFQ
EO-01
ECSS-M
series
SATELLITE SUPPLIER
SATELLITE SUPPLIER /
CUSTOMER
OT-01: RFQ/ITTs to
Suppliers of SW Products &
to SW IV&V Supplier
Request
Clarifications to
Customer
Integrate SW
Suppliers
Proposals
EI-04
External References:
In Triggers (IT)
Out Triggers (OT)
OT-01: Acquisition Products LC Processes
External Inputs (EI)
EI-01: Acq.n Proc.: Proposal prep.n & submission
EI-02: Acq.n Proc.: Submitted proposal selection
EI-03: Reusable SW Data / Information
EI-04: Software Suppliers Proposal(s)
External Outputs (EO)
EO-01: Acquisition Process: Submitted proposal
evaluation and selection

9. Satellites Software System Engineerring Process
Perspective: Software Engineering
Parent: SW System Primary LC Process
Activity: Satellite SW Systems Engineering Process
Diagram: IMP-SS-114
Design Justification File
Negotiated Customer Requirements
System DDF, DJF, TS, RB, IRD, ICD
Hardware Environment
Satellite Software System Requirements Engineering Process
IMP-SS [SEP-1/T]
Satellite Software Interface Management
IMP-SS [SEP-5/T]
SW Products I/F Requirements
Interface Management Procedures
SW Products Requirements
ECSS-M-40 Requirements
SATELLITE SUPPLIER
SATELLITE SUPPLIER
Satellites Software Project Phasing and Planning
IMP-SS [SEP-4 /T]
DJF: Technical budgets status and margin
ECSS-M-30 Project Requirements
LC Requirements for the SW Products
Satellite Software & Data Technical Budget and Margin Management
IMP-SS [SEP-6/T]
HW Environment
SATELLITE SUPPLIER
Satellites Software System Integration & Qualification
IMP-SS [SEP-3 /T]
SW Products Budget
Requirements
SATELLITE SUPPLIER
CUSTOMER
System DDF, DJF, TS, RB, IRD, ICD
Qualified SW System Configuration
Released SW Products
SATELLITE SUPPLIER
External References:
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
External Outputs (EO)

10. Satellites Software System Requirements Engineering Process
Perspective: Software Engineering
Parent: Satellite SW System Engineering Process
Activity: Satellite SW System Requirements Engi.ng
Diagram: IMP-SS-114.1
SATELLITE SUPPLIER:
System Engineering,
SW System Verification Engineering
System
SRR
SW SRRs
RB: V&V Process
Requirements
System Level Rqmts for SW Verification and Validation
IMP-SS
[SE –3 /T]
RB (inputs to)
IRD (inputs to)
Overall System Requirements
System Requirements Analysis
IMP-SS
[SE –1 /T]
System Partitioning
IMP-SS
[SE-2 /T]
On-board Software
Test Planning &
Test Facilities
Requirements T
Integrated HW-SW
Test Requirements
SATELLITE SUPPLIER:
System Engineering
SATELLITE SUPPLIER:
System Engineering
Replaceability, Patchability, Reconfigurability,
Re-programming
(In-flight and at Launch Site) Requirements
System Level Integration of Software
IMP-SS
[SE –4 /T]
On-board Software
Requirements Analysis T
RB (inputs to)
IRD (inputs to)
RB (System Partitioning with definition of items; System Configuration list)
IRD (SW/HW Interface Requirements)
DJF (Traceability to system partitioning)
SRR Data Package
RB, IRD
DJF
Reviewed SRR Data Package
RB, IRD
DJF
SATELLITE SUPPLIER:
System Engineering,
System SW Engineering
External References:
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
External Outputs (EO)

11. Satellites System Requirements Analysis
Perspective: Software Engineering
Parent: Satellite Software System Requirement Engineering
Activity: Satellite System Requirements Analysis Diagram: IMP-SS
RB: Design Constraints
V&V requirements
- SW Eng. Standards
For all Tasks
V&V Rqmts and Design Constraints Definition
IMP-SS
[SYS-3 / T]
SATELLITE SUPPLIER:
System Engineering,
System SW Engineering
Definition of system functionalities and interfaces
IMP-SS
[SYS-1 /T]
RB: Functions & Performance Rqmts
IRD: Interface Rqmts
Provision of
Specific Requirements
for
SW IV&V T
SATELLITE SUPPLIER:
System SW Ver. Eng..
System Criticality/ Critical Functions Definition
IMP-SS
[SYS-4 / T]
Overall system reqmts
RB:- Safety & Reliability Rqmts
- Critical functions identification
Operations and Maintenance Requirements Definition
IMP-SS
[SYS-2 / T]
SATELLITE SUPPLIER:
System PA & RAMS
RB (inputs to)
IRD (inputs to)
RB: Operations and Maintenance requirement
Satellite Special Requirements Definition
(T)
RB: (any special requirements concerning for instance on-board re-programmability, on-board checkout, failure tolerance,
Operating System commonality, SW Development Environment, Development Language(s), etc.)
External References:
In Triggers (IT)
External Inputs (EI)
External Outputs (EO)
Out Triggers (OT)

12. Satellites System Requirements Analysis
Perspective: Software Engineering
Parent: Satellite Software System Requirement Engineering
Activity: Satellite System Partitioning
Diagram: IMP-SS
Definition of the System Physical Architecture & Design
IMP-SS
Definition of the System Command & Monitoring Design
IMP-SS
HW-SW
Interaction Analyses
Overall System Req.s
Selection of the
candidate On-board
Computer Target(s)
IMP-SS
Satellite Functional Design Integration
IMP-SS
SATELLITE SUPPLIER:
System Engineering,
System SW Engineering
Definition of the System Modes & Transitions
IMP-SS
Definition of the System FDIR &
On-board Checkout Design
IMP-SS
Definition of the System Level SW Architecture
IMP-SS
Same roles for all Tasks
Selection of the
On-board
Computer Target(s)
and OS
IMP-SS
SW System Input t o:
RB, IRD, DJF
SW CI-list
Identify the Developmental
SW CIs
IMP-SS
Re-Use Analyses
[Re-use Process]
External References:
In Triggers (IT)
External Inputs (EI)
External Outputs (EO)
Out Triggers (OT)

13. Satellites System Requirements Analysis
Perspective: Software Engineering
Parent: Satellite Software System Requirement Engineering
Activity: System Level Rqmts for SW Verification and Validation
Diagram: IMP-SS
Same roles for all Tasks
Analyze Needs of Integrated HW-SW Components
IMP-SS
Define the Satellite SW Versioning & Release Policy
IMP-SS
Inputs to RB
Overall System Req.s
Analyze the System needs for the SVF
IMP-SS
Assess System Model s Philosophy
IMP-SS
Analyze Needs of
Interfacing Software CIs
IMP-SS
Assess SW Testing Needs for Simulators and Breadboards
IMP-SS
SATELLITE SUPPLIER:
System Engineering,
System SW Engineering,
System Verification Eng..
System SW V&V Eng..
Analyze Needs of
Satellite Flight and Additional Models
IMP-SS
External References:
In Triggers (IT)
External Inputs (EI)
External Outputs (EO)
Out Triggers (OT)

14. Satellites System level Integration of Software
Perspective: Software Engineering
Parent: Software System Requirements
Engineering
Activity: System level integration of Software Diagram: IMP-SS
SATELLITE SUPPLIER:
System Engineering,
System SW Engineering,
IF SW products integrated in system
RB: SW Observability Requirements
IRD: System level interface requirements
SW additional Requirements Definition
IMP-SS
[SLI-1 / T]
SATELLITE SUPPLIER:
System Engineering,
System SW Engineering,
Interface Data Medium Definition and Development constraints
IMP-SS
[SLI-2 / T]
System level Requirements
RB (inputs to)
IRD (inputs to)
RB: System level data interfaces, development constraints
SATELLITE SUPPLIER
CUSTOMER
Definition of Customer Products provision to supplier
IMP-SS
[SLI-3 / T]
IRD: System level integration support requirements, product preparation requirements
Simulators or Breadboards Plans & Data
External References:
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
External Outputs (EO)

15. Satellites Software System Project Phasing and Planning
Perspective: Software Engineering
Parent: Satellite SW System Engineering Process
Activity: Project Phasing and Planning
Diagram: IMP-SS-114.4
Elements of Satellite Maintenance Plan
Requirements Baseline at SRR
Software System Development Plan
Software System
Life Cycle Definition
& Planning
IMP-SS
[SLC-1 / T]
E11
Software System Development Plan Review
EI2
Software Re-use
Planning T
EI3
System vs. Software Requirements
SATELLITE SUPPLIER
SRR
Documentation/Inputs-Output Process definition for each Phase and Milestone
IMP-SS
[SLC-3 / T]
Requirements Baseline at SRR
Documentation Standards
Design Standards
Verification and Validation Standards
Software Project Development Plan
Tailoring of ECSS SW Engineering Standards & Model
IMP-SS
[SLC-2 / T]
SATELLITE SUPPLIER
Requirements Baseline
SW System
Development Planning
Information
Definition of specific Methodologies & Complementary Standards
IMP-SS /T
SATELLITE SUPPLIER
Requirements Baseline
SW System
Development Planning Information
Specific Methodologies
and complementary Standards
(e.g., RT SW, Testing, etc.)
SATELLITE SUPPLIER
External References:
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
EI1: SW PA Plan Review
EI2: SW PA Procedures & Standards Review
EI3: SW PA Life Cycle Review
External Outputs (EO)

16. Satellite Software System Interface Management
Perspective: Software Management
Parent: Satellite SW System Engineering Process
Activity: Interface Management
Diagram: IMP-SS-114.5
Interface Management Procedures,
Part of configuration Management plan
ECSS-M-40
Requirements
Definition of Satellite Interface Management Procedures
IMP-SS
[IM-1 / T]
SATELLITE SUPPLIER
CUSTOMER
Define specific Procedures
for the Satellite DB, TM/TC Data,
and Test DB
SRR Data Package
Requirements Baseline
Customer Requirements on Space vs. Ground Segment Interfaces
External References:
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
External Outputs (EO)

17. Satellite System Data Technical Budget and Margin Management
Activity: Technical Budget & Margin Management
Diagram: IMP-SS-114.6
Perspective: Software Management
Parent: Satellite SW System Engineering Process
PDR, CDR, QR, AR
Technical Budgets and Margin Philosophy
Definition of Margin Philosophy
IMP-SS
[IM-2 / T ]
Budget Status
Determination
IMP-SS
[IM-3 / T]
DJF: Technical budgets status and margins
SATELLITE SUPPLIER
CUSTOMER
SATELLITE SUPPLIER
HW environment
Characteristics & Resource Data
Assess Computer Target Resource
Capabilities against
the estimated (or measured)
Satellite SW Resource Requirements
Requirements Baseline:
SRR Data Package
Software Supplier(s) Input Data
Assess Suitability of
Reusable Software
Software Supplier(s) Input Data
External References:
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
External Outputs (EO)

18. Satellite Software System Integration & Qualification Process
Perspective: Software Engineering
Parent: Satellite SW System Engineering Process
Activity:Sat. SW System Integration & Qualification
Diagram: IMP-SS-114.3
System DDF, DJF, TS,
RB, IRD, ICD
Satellites Software System Integration & Test Definition
IMP-SS
System SW Test Procedures
Satellites Software System Testing
IMP-SS
System SW Integration & Test Procedures
Released SW Products
Tested System SW
Configuration
SATELLITE SUPPLIER:
SW System Engineering
& Verification Engineering
Integrated System SW Configuration(s)
SATELLITE SUPPLIER:
SW System Verification Engineering
System SW Integration Procedures
Satellites Software System Integration
IMP-SS
System Test Procedures
Satellite System AIV/AIT
IMP-SS
Integrated System SW Configuration(s)
Released SW
Products
Qualified SW
System Configuration
Validated SW
Products
SATELLITE SUPPLIER:
SW System Engineering
& Verification Engineering
SATELLITE SUPPLIER:
System Verification Eng..
External References:
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
External Outputs (EO)

19. Satellite Software System Integration & Test Definition Process
Perspective: Software Engineering
Parent: Satellite Software System Integration & Qualification
Activity:Sat. SW System Integ./Test Definition
Diagram: IMP-SS
SATELLITE SUPPLIER:
SW System Engineering
& Verification Engineering
SATELLITE SUPPLIER:
SW System Engineering
& Verification Engineering
System SW Integration & Test Specifications
Released SW
Products
Satellites Software System Integration & Test Definition
IMP-SS
Satellites SW System
Test-bed Setup
IMP-SS
System SW Integration & Test Procedures
System SW
Test DB
Preparation
Verify System SW
Testbed Readiness
& Setup
Nonconformances / SPRs on SW Products
Nonconformances / SPRs on SW Products
Satellites System SVF
Preparation & Setup
IMP-SS
SATELLITE SUPPLIER
System PDR Documentation
SW Products CDR Documentation
System CDR Documentation
SW Products QR Documentation
External References:
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
External Outputs (EO)

20. Satellite Software System Integration Process
Perspective: Software Engineering
Parent: Satellite Software System Integration & Qualification
Activity:Satellite SW System Integration
Diagram: IMP-SS
SW System
Integration Readiness
Review
SATELLITE SUPPLIER:
SW System Engineering
& Verification Engineering
SATELLITE SUPPLIER:
SW System Engineering
& Verification Engineering
Integrated
System SW
Configuration
System SW Integration Procedures
Satellites Software System Integration on the SVF
IMP-SS
Satellites Software System Integration Testing on the SVF
IMP-SS
Verify SW System
Integration
Nonconformances / SPRs on SW Products
Nonconformances / SPRs on SW Products
System CDR Documentation
SW Products QR Documentation
System CDR Documentation
SW Products QR Documentation
External References:
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
External Outputs (EO)

21. Satellite Software System Testing Process
Perspective: Software Engineering
Parent: Satellite Software System Integration & Qualification
Activity:Satellite SW System Testing
Diagram: IMP-SS
SW System
Test Readiness
Review
SW System
Test Readiness
Review Board
SATELLITE SUPPLIER:
SW System Engineering
& Verification Engineering
SATELLITE SUPPLIER:
SW System Engineering
& Verification Engineering
Tested
System SW Configuration
(to System QR Data Package)
System SW Test Procedures
Satellites Software System Testing on the SVF
IMP-SS
Preparation of System SW Configuration for System AIV/AIT
IMP-SS
Verify SW System
Testing and achieved
Coverage
Verify SW System
Delivery
Configuration
Nonconformances / SPRs on SW Products
Nonconformances / SPRs on SW Products
System CDR Documentation
SW Products QR Documentation
Updated System CDR Documentation
updated SW Products QR Documentation
External References:
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
External Outputs (EO)

22. Satellite Software System Supporting Processes
Perspective: ALL
Parent: Software System Life Cycle Processes
Activity: Supporting Life Cycle Processes Diagram: SS-IMP-120
SW Development plan
ECSS-M-40 Requirements
Software Configuration Management Process
IMP-SS-125
SLC-5
SW Documentation Process
IMP-SS-121
SLC-1
Available Documentation
Software Configuration Management Plan
M-50 reqs
SW docs & standards
SW Product Assurance
IMP-SS-124
SLC-4
SATELLITE SUPPLIER / CUSTOMER
SATELLITE SUPPLIER
SW PA Reports
RB, TS, Interface Requirements
SATELLITE SUPPLIER
Technical Review Reports
Traceability matrix, Verification reports
Joint Review Process
IMP-SS-126
SLC-6
Verification Process
SLC-2
Project Plans
Verification plan
SATELLITE SUPPLIER
CUSTOMER
Validation reports
SATELLITE SUPPLIER
Validation against RB Process
SLC-8
RB, Interface Requirements
Validation plan
Identified problem
Verified SW Documentation
Audit Plan and Report
Problem Resolution Process
IMP-SS-123
SLC-3
Audit Process
IMP-SS-127
SLC-7
SATELLITE SUPPLIER
SATELLITE SUPPLIER
CUSTOMER
SATELLITE SUPPLIER
External References:
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
External Outputs (EO)

23. Satellite Software System Organizational Processes
Perspective: ALL
Parent: Software System Life Cycle Processes
Activity: Organizational Life Cycle Processes Diagram: IMP-SS-130
Records of Training /Experience
Customer Reqs
Customer Reqs
Training Process
IMP-SS-132
OLC-2
Software System Management Process
IMP-SS-131
OLC-1
Residual Risk Accepted
WBS
Records of Training/Experience
Constraints Reqs
(Contract)
Schedule reports
Constraints Reqs
(Contract)
SATELLITE SUPPLIER
SATELLITE SUPPLIER
Proposal for Process improvement
(I.e. technology adv.)
SW Project Development plan
Historical data
Configured Environment
Infrastructure Process
IMP-SS-133
OLC-3
SW System Life Cycle Improvement Process
IMP-SS-134
OLC-4
Process assessment procedure and records
SW Life Cycle in the organization
SATELLITE SUPPLIER
SW SUPPLIERS
SATELLITE UPPLIER/
SW SUPPLIERS/
SW IV&V SUPPLIER
CUSTOMER
External References: ECSS-E-40 sec.
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
External Outputs (EO)

24. Satellites Software Processes
Software Products
Primary Life Cycle Processes
Satellite
Space Segment Software
System Processes
Software Products
Supporting Life Cycle Processes
Satellite Software
Products
Life Cycle Processes
Software Products
Organizational Life Cycle
Processes
Independent Software
V & V

25. Satellite Software - Software Products Life Cycle Processes
Perspective: ALL
Parent Satellite SW Life Cycle Processes
Activity:Software Products LC Process
Diagram: IMP-SS-200
Space Segment Requirements
Software Products
Primary Life Cycle Processes
SS-210
ECSS Validated SW Artifacts
SW Products Releases T
Space Segment Constraints
Software Products
Supporting Life Cycle Processes
SS-220
Software Products
Organizational Life Cycle Processes
SS-230
External References
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
External Outputs (EO)

26. SW Products Primary Life Cycle Processes
Perspective: Software Engineering
Parent: Software Products Life-Cycle Processes
Activity: SW Products Primary Life Cycle Processes Diagram: IMP-SS-210
Needs
SW Products
Acquisition Process
IMP-SS-111
[PLC-1 / T]
Negotiated Contract
DJF, DDF, TS, RB, IRD, ICD
Software Products Development Process
IMP-SS-213
[PLC-4 /T]
SATELLITE SUPPLIER
SW Products
Supply Process
IMP-SS-112
[PLC-2 / T]
SATELLITE SUPPLIER
SW SUPPLIERS
ITT/RFQ
Proposal
SW SUPPLIERS
External References:
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
External Outputs (EO)

27. Software Products Development ProcessI
Activity: Software Product Development Process
Diiagram: IMP-SS-213
Perspective: Software Engineering
Parent: SW Products Primary Life Cycle Processes
Technical Specification, Interface Control Document, Design Justification File
Design Definition File
Software Design Engineering Process
IMP-SS-213.3
[SEP-3 / T]
Requirements Baseline, Interface Requirements Document, design Justification File
Technical Specification, Interface Control Document, Design Justification File
SW SUPPLIERS
Software Requirement Engineering Process
IMP-SS-213.1
[SEP-2 / T]
Design Justification File
Hardware Environment
Interface Management
IMP-SS-213.5
[SEP-5 / T]
Interface Management Procedures
SW SUPPLIER
ECSS-M-40 Requirements
SATELLITE SUPPLIER
SW SUPPLIER
DJF: Technical budgets status and margin
Project Phasing and Planning
IMP-SS-213.4
[SEP-4 / T]
Technical Budget and Margin Management
IMP-SS-213.6
[SEP-6 / T]
HW Environment
ECSS-M-30 Project Requirements
Requirements Baseline
SW SUPPLIER
SATELLITE SUPPLIER
SW SUPPLIER
External References:
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
External Outputs (EO)

28. Project Phasing and Planning
Perspective: Software Engineering
Parent: Software Product Development Process
Activity: Project Phasing and Planning
Diagram: IMP-SS-213.4
Elements of SW Maintenance Plan
Project
Requirements
Software Life Cycle Definition
(milestones, reviews and maintenance planning)
IMP-SS
[SLC-1 / T]
Requirements Baseline at SRR
Software Project Development Plan
(Life cycle, tools and methods definition)
EI1
Software Project Development Plan Review
EI2
SRR
EI3
SW SUPPLIER: Project Manager
Documentation Input/ Output Process definition for each phase and Milestone
IMP-SS
[SLC-3 / T]
Requirements Baseline at SRR
Documentation Standards
Design Standards
Verification and Validation Standards
Software Project Development Plan
Product Level Tailoring of ECSS SW Standards
IMP-SS
[SLC-2 / T ]
SW SUPPLIER: Project Manager, SW Engineering, SW PA, SW CM
Requirements Baseline
SW Project Development Plan
Requirements Baseline
SW Project Development Plan
SW SUPPLIER: Project Manager, SW PA, SW CM, SW Engineering
Specific Required Methodologies
and complementary Standards
External References:
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
EI1: SW PA Plan Review
EI2: SW PA Procedures & Standards Review
EI3: SW PA Life Cycle Review
External Outputs (EO)

29. Technical Budget and Margin Management
Activity: Technical Budget & Margin Management Diagram: IMP-SS-213.6
Perspective: Software Management
Parent: Software Product Development Process
PDR, CDR, QR, AR
Technical budgets and margin philosophy
Definition of margin philosophy
IMP-SS
[IM-2 / T]
Budget Status Determination
IMP-SS
IM-3
HW environment
DJF: Technical budgets status and margins
SATELLITE SUPPLIER
SW SUPPLIER: SW Engineering
Requirements Baseline:
SRR Data Package
External References:
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
External Outputs (EO)

30. SW Requirements Engineering Process
Perspective: Software Engineering
Parent: Software Product Development Process
Activity: SW Requirements Engineering Process Diagram: IMP-SS-213.1
Preliminary Design
Review
SW SUPPLIE: SW Engineering, SW PA, Safety
SW SUPPLIER:
SW Engineering
Functional and Capability Specification
PDR Report
EI1
Software Requirements Analysis
IMP-SS
[R-1 / T]
Software Top Level Architectural Design
IMP-SS
[R-2 / T]
PDR Data Package
SRR Docs:
IRD RB
Higher Level Safety Plan
Product Reliability Analysis
Delivered
PDR DP
Reviewed
PDR DP
System Level Functional Analysis
SW RAMS Analysis
External References:
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
EI1: SW PA Requirements (diag. 26)
External Outputs (EO)

31. SW Requirements Analysis
Perspective: Software Engineering
Parent: SW Requirements Engineering Process
Activity: SW Requirements Analysis
Diagram: IMP-SS
EI1
Preliminary Requirements Establishment
IMP-SS
[RA-1 / T]
EO1
SW SUPPLIER: SW Engineering
Preliminary Functional and Capability Specification
Supporting
SW Prototyping
for Requirements
Analysis
Functional and Capability Specification
External Interfaces identification
IMP-SS
RA-2
Verify Software Requirements
Documents
E-40 sec
Interface Control Document (external interfaces)
SW SUPPLIER: SW Engineering
SRR Docs:
IRD RB
Delivered
Baseline
External References:
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
EI1: SW PA Requirements
External Outputs (EO)
EO1. Test case spec & procs

32. SW Top-Level Architectural Design
Perspective: Software Engineering
Parent: Software Requirement Engineering Process
Activity: SW Top-Level Architectural Design Diagram: IMP-SS
Numerical Error Report RB
Preliminary Operation Manual Definition
IMP-SS
[AD-3 / T]
Preliminary Operation manual
Architectural
Design
Definition
IMP-SS
[AD-1 / T]
EO1 SW
Top level Architecture
Functional and Capability Specification
SW SUPPLIER: SW Engineering
Preliminary PDR Data Package
SW SUPPLIER: SW Engineering
PDR Data Package
Supporting
SW Prototyping &
Design Trade-offs
Preliminary
(Top Level )
Interface Design
IMP-SS
[AD-2 / T]
Definition of Preliminary Test Requirements and Plan for SW Integration
IMP-SS
AD-4
Software
Requirements
Document
Preliminary
ICD
Preliminary SW Integration test plan
IRD
SW SUPPLIER: SW Engineering RB
Verify Software Design
SW SUPPLIER: SW Engineering
External References:
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
External Outputs (EO)
1. Integration SW/SW

33. SW Design Engineering Process
Perspective: Software Engineering
Parent: Software Product Development Process
Activity: SW Design Engineering Process Diagram: IMP-SS-213.3
Numerical Error Report
Critical Design
Review
Inspection
Q-80 sec k
Code,
Unit tests Documentation
SW SUPPLIER: SW Engineering
Detailed design DP
CDR Data Package
CDR Report
Integration
IMP-SS_
[SD-3 / T]
SW Validation
against the TS
IMP-SS
[SD-4 / T]
Design of Software Items
IMP-SS
[SD-1 / T]
Coding and Testing
IMP-SS
[SD-2 / T]
SW SUPPLIER: SW Engineering
SW SUPPLIER: SW Engineering
Software
Architectural
Design
Document
SW SUPPLIER: SW Engineering
Delivered
CDR Data Package
Safety Analysis
Design Complexity & Modularity Measurement
Reviewed
CDR Data Package
Critical Module Handling
External References:
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
External Outputs (EO)

34. Design of SW Items In Triggers (IT) Out Triggers (OT)
Parent: Software Design Engineering Process
Perspective: Software Engineering
Activity: Design of SW Items
Diagram: IMP-SS
SW SUPPLIER: SW Engineering
Operation Manual Update
IMP-SS
[SDI-3 / T]
Operation Manual Update
Detailed Design document
EI1
Detailed Design Definition
IMP-SS
[SDI-1 / T]
SW Unit Test Plan
SW SUPPLIER:
SW Engineering
Detailed design DP
SW Unit Test Planning
IMP-SS
[SDI-4 / *
SW SUPPLIER:
SW Engineering
Detailed Interface Design (external)
IMP-SS
[SDI-2 / T]
Delivered
Detailed Design Data Package
Software
Architectural
Design
Document
Update of Test Requirements and Plan for SW Integration
IMP-SS
[SDI-5 / T]
ICD
SW Integration Test Plan
SW SUPPLIER
Verify Software Design
SW SUPPLIER: SW Engineering
External References:
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
1. Coding and Testing.Unit Test Execution
External Outputs (EO)

35. Coding and Testing In Triggers (IT) Out Triggers (OT)
Parent: Software Design Engineering Process
Perspective: Software Engineering
Activity: Coding and Testing
Diagram: IMP-SS
Unit Testing feedback
SW Unit
Testing
IMP-SS
[SC-3 / T]
modify
EO1
EO1
SW Unit
Coding
IMP-SS
[SC-1 / T]
SW Code
SW Unit
Test Report
SW SUPPLIER: SW Engineering
Code,
Unit tests Documentation
Review & Check Coverage
SW SUPPLIER: SW Engineering
Operation Manual Update
IMP-SS
[SC-4 / T]
Operation Manual
Update
SW SUPPLIER: SW Engineering
Unit Test Procedures and Data Definition
IMP-SS
[SC-2 / T]
Delivered
Code & Unit tests
Detailed Design
Update of Test Requirements and Plan for SW Integration
IMP-SS
[SC-5 / T]
SW Integration Test Plan
SW SUPPLIER: SW Engineering
Unit Test Plan
Verify Software
Code
SW SUPPLIER: SW Engineering
External References:
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
External Outputs (EO)
1. Design of SW Item.SW Component
Design Document

36. Integration In Triggers (IT) Out Triggers (OT) External Inputs (EI)
Parent: Software Design Engineering Process
Perspective: Software Engineering
Activity: Integration
Diagram: IMP-SS
Operation Manual Update
Operation Manual Update
IMP-SS
[IN-
/ T]
SW SUPPLIER: SW Eng. & SW Ver. Eng.
SW/SW
Integration
IMP-SS
[IN-1 / T]
SW Integration Test Report
EI2
SW SUPPLIER: SW Eng. & SW Ver. Eng.
Check Coverage
SW Code
Unit test documentation
IT1
Verify Software Integration
Validation test case
and procedure definition
IMP-SS
[IN-3 / T]
EI1
SW Validation Testing specification
SW SUPPLIER: SW Eng. & SW Ver. Eng, SW PA.
External References:
In Triggers (IT)
1. Qualification.Validation Plan Def.
Out Triggers (OT)
External Inputs (EI)
1. SW Req. Analysis.SW Requirements Document
2. SW Top Level Srch. Design.Architectural Design
External Outputs (EO)

37. SW Product Validation against the Technical Specification
Perspective: Verification & Validation Engineering
Parent:Software Design Engineering Process
Activity: SW Validation against TS
Diagram: IMP-SS
Operation manual (update)
Test Readiness Review Board
Test Readiness Review
Update the operation manual
VI-3
Validation Plan,
Validation Reqs
SW design and test evaluation report
SW Validation Test Spec.n
SW SUPPLIER:
SW Engineering
Software Validation Testing Specification Definition
VI-1
Evaluate the design, code, test and operation manual
VI-4
Validation testing
against the TS
VI-2
Validation testing reports,
Non conformance reports,
Problem reports,
Validated Software
CDR Data Package
SW Product,
Validation Environment (HW/SW)
SW SUPPLIER: SW Verification Eng..
SW SUPPLIER: SW Eng.., SW Ver. Eng..
SW SUPPLIER: SW Engineering
Update and prepare the deliverables SW product
VI-5
Check
Coverage
Verify test
Analysis and Inspection
VI-6
SW SUPPLIER: SW Eng..
SW on delivery media,
SW release doc.,
Baseline deliverables
SW Design/Code
SW Specification
Analysis and Inspection reports
SW SUPPLIER: SW PA,
SW Eng.., SW Ver. Eng..
External References: ECSS-E-40 sec. 5.5.xx , ECSS-Q-80 sec q, 3.3.4g, 3.3.4r
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
External Outputs (EO)

38. SW Product Supporting Life Cycle Processes
Perspective: ALL
Parent: Software Product Life Cycle Processes
Activity: Supporting Life Cycle Processes Diagram: SS-IMP-200
SW Development plan
ECSS-M-40 Requirements
Software Configuration Management Process
IMP-SS-225
SLC-5
SW Documentation Process
IMP-SS-221
SLC-1
Available Documentation
Software Configuration Management Plan
M-50 reqs
SW docs & standards
SW Product Assurance
IMP-SS-224
SLC-4
SW SUPPLIER / SATELLITE SUPPLIER
SW SUPPLIER
SW PA Reports
RB, TS, Interface Requirements
Traceability matrix, Verification reports
Verification Process
SLC-2
SW SUPPLIER
Technical Review Reports
Project Plans
Joint Review Process
IMP-SS-226
SLC-6
Verification plan
SW SUPPLIER
RB, Interface Requirements
Validation against RB Process
SLC-8
SATELLITE SUPPLIER
SW SUPPLIER
CUSTOMER
Validation plan
Identified problem
Verified SW Documentation
Audit Plan and Report
Problem Resolution Process
IMP-SS-223
SLC-3
Audit Process
IMP-SS-227
SLC-7
SW SUPPLIER
SATELLITE SUPPLIER
CUSTOMER
SW SUPPLIER
SW SUPPLIER
External References:
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
External Outputs (EO)

39. SW Product Organizational g Life Cycle Processes
Perspective: ALL
Parent: Software Product Life Cycle Processes
Activity: Organizational Life Cycle Processes DIAGRAM: IMP-SS-230
Records of Training /Experience
Customer Reqs
Customer Reqs
Training Process
IMP-SS-232
OLC-2
Software System Management Process
IMP-SS-231
OLC-1
Residual Risk Accepted
WBS
Records of Training/Experience
Constraints Reqs
(Contract)
Schedule reports
Constraints Reqs
(Contract)
SW SUPPLIER
SW SUPPLIER
Proposal for Process improvement
(I.e. technology adv.)
SW Project Development plan
Historical data
Configured Environment
Infrastructure Process
IMP-SS-233
OLC-3
SW System Life Cycle Improvement Process
IMP-SS-234
OLC-4
Process assessment procedure and records
SW Life Cycle in the organization
SATELLITE SUPPLIER
SW SUPPLIERS
SATELLITE UPPLIER/
SW SUPPLIERS/
SW IV&V SUPPLIER
CUSTOMER
External References: ECSS-E-40 sec.
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
External Outputs (EO)

40. Satellites Software Processes Space Segment Software
System Processes
Independent V&V of
Software Products
Satellite Software
Products
Life Cycle Processes
SW IV&V Support to
Joint
Review Process
Independent Software
V & V

41. Satetllite Software - Software Products Life Cycle Processes
External References
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
External Outputs (EO)
Perspective: Software Engineering
Parent:Satellite SW Lice Cycle Processes
Activity:SW IV&V Process
Diagram: IMP-SS-300.0
Specific SW IV&V Requirements
SW Products
Artifacts
Independent V&V of
Software Products
IMP-SS-310
Independently Verified ECSS SW Artifacts
SW Products Requirements
SW SUPPLIERS
SW IV&V SUPPLIER
Independently Determined Process & Software Problems
SW IV&V Support to Joint
Review Process
IMP-SS-320
Space Segment Requirements
SATELLITE SUPPLIER
SW IV&V SUPPLIER
SATELLITE SUPPLIER
SW IV&V SUPPLIER
SW SUPPLIERS

42. Satellite SW Independent Verification and Validation Processes
Perspective: Verification and Validation Engineering
Parent: Supporting Life Cycle Processes
Activity: IV&V of SW Products
Diagram IMP-SS-310
Specific SW IV&V Requirements
Independent
Verification Process Implementation
IMP-SS-311
[VP-1 / T]
Independent
Verification Process
IMP-SS-312
[VP-2 / T]
SW IV&V SUPPLIER
Technical Specifications, Design Definition Files, Design Justification Files
Independently Verified ECSS SW Artifacts
SW Products
Artifacts
SW Products Requirements
SW IV&V SUPPLIER
Independently Determined Process & Software Problems
Independent
Validation Process Implementation
IMP-SS-313
[VLP-1 / T]
Space Segment Requirements
SW IV&V SUPPLIER
Independent Validation Process
of the SW Products
IMP-SS-314
[VLP-2 / T]
Technical Specifications,
Design Definition Files, Design Justification Files
SW IV&V SUPPLIER
External References:
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
External Outputs (EO)

43. Satellite Independent SW Verification Process Implementation
Perspective: Verification & Validation Engineering
Activity: Ind. SW Verification Process Implementation
Diagram: IMP-SS-311
Parent: IV&V of SW Products
Determine the Independent Verification effort for the SW Product
IMP-SS-311.1
[VPP-1 / T]
Independent
Verification plan:
criticality and effort
SW IV&V SUPPLIER
Independent
Verification plan: methods & tools
Establish the Independent Verification Process
IMP-SS-311.2
[VPP-2/T]
Independent
Verification plan
Determine the activities/SW products that require IV&V
IMP-SS-311.4
[VPP- / T]
Develop and document an Independent Verification Plan
IMP-SS-311.5
[VPP-5 / T]
SW IV&V SUPPLIER
SW IV&V SUPPLIER
SATELLITE SUPPLIER
CUSTOMER
SW IV&V SUPPLIER
Select the organization responsible for conducting the IV&V
IMP-SS-311.3
[VPP-3 / T]
Independent
Verification plan: project organization
Satellite SW System PDR
Data Package
CUSTOMER
SATELLITE SUPPLIER
External References:
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
External Outputs (EO)

44. Satellite SW Independent Verification Process
Perspective: Verification and Validation Engineering
Activity: Independent SW Verification Process
Diagram: IMP-SS-312
Parent: IV &V of SW Products
SW Products Technical Specifications
Requirements Independent Verification report
Preliminary Detailed Design Data Packages
Independent Design Verification report
Independently Verify SW Requirements
IMP-SS-312.1
[VPI-1/T]
Independently Verify SW Design
IMP-SS-312.2
[VPI-2 / T]
Preliminary PDR Data Packages
Independent
Verification plan
Independent
Design Verification report
Verification plan
SW IV&V SUPPLIER
SW IV&V SUPPLIER
Delivered Products code
Independent
Code Verification report
Products Project documentation
Independently Verify
Code
IMP-SS-312.3
[VPI-3 / T]
Independently Verify SW Documentation
IMP-SS-312.5
[VPI-5 / T]
SW integration Reports
Independent
Verification plan
Independently Verify SW Integration
IMP-SS-312.4
[VPI-4 / T]
Independent
Verification plan
SW IV&V SUPPLIER
Independent
Test specification
evaluation
SW IV&V SUPPLIER
Independent
SW Integration Verification report
Independent
Verification plan
SW IV&V SUPPLIER
Problems and non-conformances Handling
IMP-SS-312.6
[VPI-6 / T]
Problem and non-conformance Reports
Independent Verification plan:
criticality and effort
SW IV&V SUPPLIER
External References:
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
External Outputs (EO)

45. Independent SW Validation Process Implementation
Perspective: Verification & Validation Engineering
Parent: IV &V of SW Products
Activity: Ind. Validation Process Implementation Diagram: IMP-SS-313
Independent Validation
plan:
effort &
independence
Determine the Independent Validation effort for the project
IMP-SS-313.1
[PLAN-1 / T]
Validation plan: organization
Validation plan
SW Products
Artifacts
Develop and document the Independent Validation plan
IMP-SS-313.3
[PLAN-4 / T]
SW IV&V SUPPLIER
Independent
Validation plan: methods & tools
SW Products Requirements
Establish the Independent Products
Validation Process
IMP-SS-313.2
[PLAN-2 / T]
Space Segment Requirements
SW IV&V SUPPLIER
SW IV&V SUPPLIER
Independent Validation Plan
at SW System PDR
External References:
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
External Outputs (EO)

46. Independent SW Validation against the Requirements Baseline
Perspective: Verification & Validation Engineering
Activity: Independent Validation of the SW Products
Diagram: 314
Parent: IV &V of SW Products
Operation manual (update)
Independent Test Readiness Review Board
Assess the adequacy of the operation manual
IMP-SS-314.3
[VI-3 / T]
Independent
Test Readiness
Assessment
SW Validation Testing Spec
SW IV&V SUPPLIER
Independently
Evaluate the design, code, test and operation manual
IMP-SS-314.4
[VI-4 / T]
Independent. Software Validation Testing Spec. Definition
IMP-SS-314.1
[VI-1 / T]
Ind. Validation Testing
against the RB
IMP-SS-314.2
[VI-2 / T]
Independent
SW design and test evaluation reports
IV&V Reports
NCRs, SPRs
SW product,
Validation environment (HW/SW)
SW IV&V SUPPLIER
SW IV&V SUPPLIER
SW IV&V SUPPLIER
Assess the SW products Preparation for Delivery
IMP-SS-314.5
[VI-5 / T]
SW Products
Artifacts
SW on delivery media,
SW release documentation,
Baseline deliverables SW product
Check Coverage
of SW Supplier & Independent Tests
SW Products Requirements
SW IV&V SUPPLIER
Space Segment Requirements
External References:
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
External Outputs (EO)

47. ECSS Software Process Model Implementation Examples
The Ground Segment
System Processes
Ground Software
Processes
The Ground Segment
SW Products
Life Cycle Processes
Implementation
Samples
The Ground Segment
Operations & Mission
Products
Life Cycle Processes

48. Ground Segment Software Processes Operation & Mission Products
External References
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
External Outputs (EO)
Perspective: ALL
Parent: Satellite SW Life Cycle Processes
Activity Satellite Software Processes
Diagram: IMP-GS-000
Ground Segment Requirements
Ground Segment
Software System
Life-cycle Process
GS-100
Ground Segment Constraints
ECSS SW Artifacts
Ground Segment Software Product Releases
Validated Ground Segment SW
Operations Procedures &
Flight Plans
SW Products Requirements
Space Segment
Artifacts & Products
Operations & Mission SW Products
CUSTOMER / GROUND SEGMENT SUPPLIER
Ground Segment
Operation & Mission Products
Preparation Processes
GS-300
Ground Segment Requirements
Mission Needs
SW Products
Artifacts
ECSS SW Artifacts
GROUND SEGMENT
OPERATOR / MAINTAINER
Ground Segment
Software Products
Life-cycle Processes
GS-200
ECSS SW Artifacts
SW Products Requirements
Software Product Releases
SW SUPPLIERS

49. Ground Segment Software - Software System Life Cycle Processes
External References
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
External Outputs (EO)
Perspective: ALL
Parent: Ground Segment Software System LC Process
Activity:Primary Life Ccle Processes
Diagram: IMP-GS-100
Ground Segment Constraints
Space Segment
Artifacts & Products
Ground Segment Requirements
Validated Ground Segment SW
Ground Segment
Software System
Primary Life Cycle Processes
GS-110
ECSS SW Artifacts
SW Products Requirements
Software Product Releases T
CUSTOMER / GROUND SEGMENT SUPPLIER
Ground Segment
Software System
Supporting Life Cycle Processes
GS-120
CUSTOMER / GROUND SEGMENT SUPPLIER
Ground Segment
Software System
Organizational Life Cycle Processes
GS-130
CUSTOMER / GROUND SEGMENT SUPPLIER

50. Ground Segment Software System Primary Life Cycle Processes
External References
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
External Outputs (EO)
Perspective: ALL
Parent: Ground Segment SW System LC Processes
Activity: SW System Primary LC Process
Diagram: IMP-GS-110
Ground Segment Requirements
Software Product Releases
Ground Segment Systems
Acquisition Process
IMP-GS-111
[PLC-1 / T]
DJF, DDF, TS, RB, IRD, ICD
Negotiated Ground Segment Contract
Ground Segment Systems
Software Engineering Process
IMP-GS-114
[PLC-4 / T]
SW Products Requirements
Validated
SW Products
Ground Segment Constraints
CUSTOMER
Ground Segment Products
Supply Processes
IMP-GS-112
[PLC-2 / T]
Independently Determined
Process & Software
Problems
GROUND SEGMENT SUPPLIER
ITT/RFQ
GROUND SEGMENT SUPPLIER
Proposal
Space Segment Reusable
Facilities & DBs
Ground Segment
Software Operations Engineering Process
IMP-GS-113 [PLC-3]
Maintenabilty Requirements
Maintenance Plan
Operational Plan
Operational Requirements
Satellite & Ground Segment Software Maintenance and Migration
IMP-GS-115 [PLC-5]
GROUND SEGMENT SUPPLIER OPERATOR
CUSTOMER
Change Justification File
Ground Segment Reusable
Facilities & DBs
GROUND SEGMENT SUPPLIER
SW MAINTAINER

51. Ground Segment Software System Engineerring Process
Perspective: Software Engineering
Parent: Ground Segment SW System Primary LC Process
Activity: SW Systems Engineering Process
Diagram: IMP-GS-114
Design Justification File
Negotiated Customer Requirements
System DDF, DJF, TS, RB, IRD, ICD
Hardware Environment
GS Software Systems Requirements Engineering Process
IMP-GS [SEP-1/T]
GS Software Interfaces Management
IMP-GS [SEP-5/T]
SW Products I/F Requirements
Interface Management Procedures
SW Products Requirements
ECSS-M-40 Requirements
GROUND SEGMENT SUPPLIER
GROUND SEGMENT SUPPLIER
GS Software Project Phasing and Planning
IMP-GS [SEP-4 /T]
DJF: Technical budgets status and margin
ECSS-M-30 Project Requirements
LC Requirements for the SW Products
GS Software & Data Technical Budget and Margin Management
IMP-GS [SEP-6/T]
HW Environment
GROUND SEGMENT SUPPLIER
GS Software Systems Integration & Qualification
IMP-GS [SEP-3 /T]
SW Products Budget
Requirements
System DDF, DJF, TS, RB, IRD, ICD
GROUND SEGMENT SUPPLIER /
CUSTOMER
Qualified SW System Configuration
Released SW Products
GROUND SEGMENT SUPPLIER
External References:
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
External Outputs (EO)

52. Ground Segment Software System Requirements Engineering Process
Perspective: Software Engineering
Parent: Ground Segment SW System Engineering Process
Activity: Satellite SW System Requirements Engi.ng
Diagram: IMP-GS-114.1
System
SRR
SW SRRs
RB: V&V Process
Requirements
System Level Rqmts for SW Verification and Validation
IMP-GS
[SE –3 /T]
RB (inputs to)
IRD (inputs to)
Overall GS System Requirements
System Requirements Analysis
IMP-GS
[SE –1 /T]
System Partitioning
IMP-GS
[SE-2 /T]
GS SUPPLIER
Specific
Ground Software
Test Planning & Test
Facilities
Requirements T
Integrated HW-SW
Test Requirements
GS SUPPLIER
GS SUPPLIER
Reusable
Space Segment
&
Existing Ground Segments SW
System Level Integration of Software
IMP-GS
[SE –4 /T]
Ground SW Reuse
Process T
RB (inputs to)
IRD (inputs to)
RB (System Partitioning with definition of items; System Configuration list)
IRD (SW/HW Interface Requirements)
DJF (Traceability to system partitioning)
SRR Data Package
RB, IRD
DJF
Reviewed SRR Data Package
RB, IRD
DJF
GS SUPPLIER
External References:
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
External Outputs (EO)

53. Ground Segment Software System Requirements Analysis
Perspective: Software Engineering
Parent: Software System Requirement Engineering Process
Activity: System Requirements Analysis Diagram:
RB: Design Constraints
V&V requirements
- SW Eng. Standards
V&V Rqmts and Design Constraints
IMP-GS
SYS-3
Definition of system functionalities and interfaces
IMP-GS
SYS-1
RB: Functions & Performance Rqmts
IRD: Interface Rqmts
Assess I&V Req.s
for
Ground Facilities
CUSTOMER
GS Systems Criticality/ Critical Functions Definition
IMP-GS
SYS-4
CUSTOMER
Overall system reqmts
RB (inputs to)
IRD (inputs to)
RB:- Safety & Reliability Rqmts
- Critical functions identification
Operations and Maintenance Requirements Definition
IMP-GS
SYS-2
RB: Operations and maintenance requirement
CUSTOMER
Human Factors, Simulation, DB, & Real-time
Engineering Requirements Definition
RB:Specific Design & Implementation Requirements
CUSTOMER
External References: ECSS-E-40 sec , ,
In Triggers (IT)
External Inputs (EI)
External Outputs (EO)
Out Triggers (OT)

54. Ground Segment Software System Integration & Qualification Process
Perspective: Software Engineering
Parent: GS SW System Engineering Process
Activity: GS SW System Integration & Qualification
Diagram: IMP-GS-114.3
System DDF, DJF, TS,
RB, IRD, ICD
GS Software Systems Integration & Test Definition
IMP-GS
System SW Test Procedures
GS Software Systems Testing
IMP-GS
System SW Integration & Test Procedures
Released SW Products
Tested System SW
Configuration
Integrated System SW Configuration(s)
GS SUPPLIER
GS SUPPLIER
Space Segment Products
Space Segment Products
System SW Integration Procedures
GS Software Systems Integration
IMP-GS
System Test Procedures
GS Systems I&V
IMP-SS
Integrated System SW Configuration(s)
Released SW
Products
Qualified SW
System Configuration
Validated SW
Products
GS SUPPLIER
GS SUPPLIER
External References:
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
External Outputs (EO)

55. Ground Segment Software System Project Phasing and Planning
Perspective: Software Engineering
Parent: Ground Segment SW System Engineering Process
Activity: Project Phasing and Planning
Diagram: IMP-GS-114.4
Elements of Satellite & GS Maintenance Plan
Requirements Baseline at SRR
Software System Development Plan
Software System
Life Cycle Definition
& Planning
IMP-GS
[SLC-1 / T]
E11
Software System Development Plan Review
EI2
Software Re-use
Planning T
EI3
GS System vs. Software Requirements
GS SUPPLIER
SRR
Documentation/Inputs-Output Process definition for each Phase and Milestone
IMP-GS
[SLC-3 / T]
Requirements Baseline at SRR
Documentation Standards
Design Standards
Verification and Validation Standards
Software Project Development Plan
Tailoring of ECSS SW Engineering Standards & Model
IMP-GS
[SLC-2 / T]
GS SUPPLIER
Requirements Baseline
SW System
Development Planning
Information
Definition of specific Methodologies & Complementary
Standards
IMP-GS /T
GS SUPPLIER
Requirements Baseline
SW System
Development Planning Information
Specific Methodologies
and complementary Standards
(e.g., RT SW, Testing, etc.)
GS SUPPLIER
External References:
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
EI1: SW PA Plan Review
EI2: SW PA Procedures & Standards Review
EI3: SW PA Life Cycle Review
External Outputs (EO)

56. Ground Segment Software Interfaces Management
Perspective: Software Management
Parent: Ground Segment SW System Engineering Process
Activity: Interface Management
Diagram: IMP-GS-114.5
Interface Management procedures,
Part of configuration management plan
ECSS-M-40
Requirements
Definition of interfaces management procedures
Definition
IMP-GS
IM-1
CUSTOMER
Space to Ground Segment
Interfaces Specific
Management Procedures
Definition
Space Segment Interfaces
Control Procedures
SRR Data Package
Requirements Baseline
External References: ECSS-E-40 sec
In Triggers (IT)
Out Triggers (OT)
External Inputs (EI)
External Outputs (EO)