1. Software Architecture in Practice
RiSE’s Seminars
Bass’s book :: Chapter 15
Ana Paula Cavalcanti
December 5, 2018

2. Summary
CelsiusTech: A Case Study in Product Line Development (Chapter 15)
Relationship to the Architecture Business Cycle
Requirements and Quality
Architectural Solution
Conclusion
December 5, 2018

3. Relationship to the Architecture Business Cycle
CelsiusTech: A Case Study in Product Line Development :: Chapter 15
Relationship to the Architecture Business Cycle
CelsiusTech:: Leading supplier of command-and-control systems
Composed of: CelsiusTech Systems, CelsiusTech Eletronics, CelsiusTech IT
The ship System 2000 Naval Product Line
Integrated system that unifies all weapons, command-and-control and communications systems on warship
Production of a wide variety of naval systems (surface and submarine)
Economics of Product Lines
December 5, 2018

4. Relationship to the Architecture Business Cycle
CelsiusTech: A Case Study in Product Line Development :: Chapter 15
Relationship to the Architecture Business Cycle
ships A B C D E F G
1986
1988
1990
1992
1994
1996
Shrinking schedules
December 5, 2018

5. Relationship to the Architecture Business Cycle
CelsiusTech: A Case Study in Product Line Development :: Chapter 15
Relationship to the Architecture Business Cycle
Code Re-use
Using Core assets to expand the Business Area
Takes advantage of the architecture and other core assets
A successful product line organization considers its business to be the care, nurturing, and growth of its software product line, singular, particularly its core asset base.
An important point is what a successful product line organization can do, at the enterprise level, with this powerful capability. That is, an articulated definition of what systems are within the product line’s capability to build.
December 5, 2018

6. Relationship to the Architecture Business Cycle
CelsiusTech: A Case Study in Product Line Development :: Chapter 15
Relationship to the Architecture Business Cycle
Motivation…
Everything was new (time of high technology flux)
Analysis of the business context
Ownerships changes
Necessity to change organization by circumstances:: award of 2 naval contracts
Technology changes:: maturation
{Increased the time required to create product line but up to 1/3 of its initial technology investment was spent building assets that can now be purchased commercially.}
December 5, 2018

7. Relationship to the Architecture Business Cycle
CelsiusTech: A Case Study in Product Line Development :: Chapter 15
Relationship to the Architecture Business Cycle
CelsiusTech’s Organizational Structure
Family
Manager
Command
and
Control
Tracking
Communications
Operator’s
Console
Base
System
Integration
Functional Areas
Each functional area was led by a project manager
December 5, 2018

8. Relationship to the Architecture Business Cycle
CelsiusTech: A Case Study in Product Line Development :: Chapter 15
Relationship to the Architecture Business Cycle
Architecture
Team
Costumer Project
Management
Integration and
CM Team
Program
Manager
Marketing C3
HCI
Weapons
Fundamental
Services
CelsiusTech’s Organizational Structure
Product Line Software
Development Teams
December 5, 2018

9. Relationship to the Architecture Business Cycle
CelsiusTech: A Case Study in Product Line Development :: Chapter 15
Relationship to the Architecture Business Cycle
CelsiusTech’s Organizational Structure
Strong management team focused on product line
The success of a product line hinged on a stable yet flexible architecture
Architecture team was responsible for the initial development and continued ownership and control of the product line architecture
Project staffing levels ranged from an initial 20 to 30 to a peak of more than 200.
December 5, 2018

10. Relationship to the Architecture Business Cycle
CelsiusTech: A Case Study in Product Line Development :: Chapter 15
Relationship to the Architecture Business Cycle
CelsiusTech’s Organizational Structure
Research and Development
Group
Technical Steering Group
System Definition
Naval Business Unit
Development C2
Weapons
HCI
Global resources to All Business Units
Air Defense Business Unit
December 5, 2018

11. Relationship to the Architecture Business Cycle
CelsiusTech: A Case Study in Product Line Development :: Chapter 15
Relationship to the Architecture Business Cycle
CelsiusTech’s Organizational Structure
Emphasis increasingly shifted from the development of the architecture and product line elements to the composition of new customer systems from the product line.
Increased the size and responsibilities of the customer project management group.
Staffing  fewer designers, developers and integrators.
December 5, 2018

12. Requirements and Quality
CelsiusTech: A Case Study in Product Line Development :: Chapter 15
Requirements and Quality
For new products to be derived from an organizational repository, they must be structured so that they can share modules. There must be a standard set of modules.
Primary purpose of an architecture:
Achieve a system that meets its behavioral and quality requirements:
Performance
Modifiability
Safety, reliability and availability
Testability
December 5, 2018

13. Architectural Solution
CelsiusTech: A Case Study in Product Line Development :: Chapter 15
Architectural Solution
Process View
How distribution was accomplished
Layered View
Discussing how Ship System 2000 achieves a separation of concerns
Module Decomposition View
Show assignment of responsibilities to different large-scale elements of the system
December 5, 2018

14. CelsiusTech: A Case Study in Product Line Development :: Chapter 15
Conclusion
CelsiusTech evolved from a defense contractor providing custom-engineered point solutions to essentially a vendor of commercial off-the-shelf naval systems
Architecture served as the foundation of the approach {technically and culturally} and for a long-term development effort.
Full support of project management
Architectures team’s authority
December 5, 2018

15. References
BASS, L.; CLEMENTS, P.; KAZMAN, R. Software Architecture in Practice. Addison-Wesley, 2003.
CLEMENTS, P.; NOTHROP, L. Software Product Lines – Practice and Patterns. Addison-Wesley, 2002.
December 5, 2018