1. An Iterative Method For System Integration
The seventh National Conference INCOSE_IL 2013
Effective Integration
An Iterative Method For System Integration
Emilia L.
Effective Integration / An Iterative Method For System Integration

2. Effective Integration / An Iterative Method For System Integration
Different or Similar?
Effective Integration / An Iterative Method For System Integration

3. Error Cost Factors During Project Life Cycle
“Error Cost Escalation Through the Project Life Cycle “, Haskins B., 2004
Session Name / Lecture Name

4. Effective Integration / An Iterative Method For System Integration
System Development Methods:
Waterfall
Simple, structural approach
Easily planned
Doesn’t adapt easily to requirements change or unplanned technology challenges
Multidisciplinary interaction late in the development process
No intermediate products
Classic integration methodology
Time
Effective Integration / An Iterative Method For System Integration

5. Effective Integration / An Iterative Method For System Integration
System Development Methods: Spiral Model
Presented by B. Boehm in 1986
Intended for software development
Iterative development
Each iteration of the spiral:
Determine the objectives, alternatives, and constraints
Evaluate alternatives and identify and resolve risk issues.
Develop and verify the product for this iteration.
Plan the next iteration
Effective Integration / An Iterative Method For System Integration

6. Effective Integration / An Iterative Method For System Integration
Spiral Methodology
Complicated approach
Higher costs
Flexible
Built-in risk management
Adapted for changes
Multiple decision points
Fast time-to-market of prototypes
Spiral model (Boehm, 1988).
Effective Integration / An Iterative Method For System Integration

7. Effective Integration / An Iterative Method For System Integration
Spiral Model Applications
Large and risky projects
Employed by IBM, Microsoft, Amdocs
Common in Aerospace and Defense industry
Not only for software:
US military has adopted the spiral model for its Future Combat Systems program
Can be applied for system integration phase?
Effective Integration / An Iterative Method For System Integration

8. Effective Integration / An Iterative Method For System Integration
System Integration Phase
System build from discrete components
Complex
Payment for schedule deviations and development faults
Difficult planning
Faults causing requirements change
Unpredictable timeline
Spiral model is defined to cope with the same problems
Effective Integration / An Iterative Method For System Integration

9. An Iterative Method For System Integration
Project Integration & Test
Project Definition
Time
Concept of operation
Requirements & Architecture
Detailed Design
Implementation (IM(
Integration & Test (I&T (
System Verification (POD(
Operation & Maintenance
Project Integration & Test
Project Definition
Time
Concept of operation
Requirements & Architecture
Detailed Design IM
I&T
System Verification(POD(
Operation & Maintenance
Spiral system integration and test
Integration throughout the whole development process
Integration iterations defined at system PDR
Effective Integration / An Iterative Method For System Integration

10. Effective Integration / An Iterative Method For System Integration
Iterative Integration Flow
Each iteration:
Determine the objectives
Components, constraints, risk issues, thresholds, product/result
Define integration and verification processes
Plan the schedule, define the setup and the tests
Develop the components
Implementation, risk reduction, component validation, regression
Integrate the system
Integration processes, verification
Validate current iteration product
Proof of design, regression tests
Update next iteration plan
Lessons learned at current iteration, schedule adaptation. Iterations are defined at system’s PDR and refined during the development process.
Effective Integration / An Iterative Method For System Integration

11. Effective Integration / An Iterative Method For System Integration
Iterative Integration Example RF
MODEM
Network Controller
Application
Communication system
Iteration 1: Integration and validation of components’ hardware
Iteration 2: Integration and validation of product’s hardware
Iteration 3: Internal and external interfaces integration and validation
Iteration 4: Built-In-Test integration
Iteration 5: Testing and debugging tools integration
Iterations 6-9: Operational modes integration and validation
Iteration 10: Integration with production test equipment
Iteration 11: System proof of design
Effective Integration / An Iterative Method For System Integration

12. Effective Integration / An Iterative Method For System Integration
Iterative Integration Implications
System integration is the backbone of the development process
Integration defines the work plan of all disciplines
Integration system engineer is active starting from the SRR
Multiple validation iterations
Effective and automatic test equipment
Shorter schedule and reliable results
Early validation of product’s specific test equipment
Integration team is active from early stages of the project
Gradual and profound learning of the system
Highly effective at faults detection and repair
Tight time coupling between implementation and integration resulting in faster iterations
Effective Integration / An Iterative Method For System Integration

13. Effective Integration / An Iterative Method For System Integration
Iterative Integration Pros & Cons
Higher costs
Complicated planning
Build-in risk management
Flexibility at requirements change
Highly adaptive
Reliable schedule planning
Highly effective integration process
Ability for intermediate products
Enable early production line foundation for mass production products with short time to market
Shorter Time-to-Market
Effective Integration / An Iterative Method For System Integration

14. Effective Integration / An Iterative Method For System Integration
Conclusions
Iterative method for system integration is suitable for large and risky projects
Can be used effectively for smaller scale projects
Highly suitable for modern market by flexibility to requirement change, intermediate products and short response time
Effective Integration / An Iterative Method For System Integration

15. Effective Integration / An Iterative Method For System Integration
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Effective Integration / An Iterative Method For System Integration