Software Engineering Institute Carnegie Mellon University Pittsburgh, PA Sponsored by the U.S. Department of Defense 1 Towards Component-based Systems Stephen E. Cross 7 February 2000

2 What I’d like to share with you Brief SEI overview New challenges encountered with commercial components First steps: understanding the component/method space Summary

3 Most of this talk is based a forthcoming book entitled Software Engineering with Commercial Components by Kurt Wallmau, Scott Hissam, and Robert Seacord. It will be published as part of the SEI- Addison Wesley Software Engineering Series later in 2001.

4 Software Engineering Institute DoD R&D laboratory federally funded research and development center (FFRDC) Situated as a college level unit at Carnegie Mellon University, Pittsburgh PA Mission is to provide leadership in software engineering and to transition new software engineering technology Encouraged to support industry in precompetitive technology R&D and in technology transition activities

5 SEI Technical Program Capability Maturity Model Integration Accelerating Software Technology Adoption COTS-Based Systems Dependable Systems Upgrade Architecture Tradeoff Analysis Technical Practice Initiatives Team Software Process Software Engineering Measurement & Analysis Survivable Systems Product Line Practice The right software delivered defect free, on time, every time High confidence, evolvable, product lines with predictable and improved cost, schedule, and quality Management Practice Initiatives

6 SEI Technical Program Management Practice Initiatives Capability Maturity Model Integration Accelerating Software Technology Adoption COTS-Based Systems Dependable Systems Upgrade Architecture Tradeoff Analysis Technical Practice Initiatives Team Software Process Software Engineering Measurement & Analysis Survivable Systems Product Line Practice Predictable Assembly with Certifiable Components The right software delivered defect free, on time, every time High confidence, evolvable, product lines with predictable and improved cost, schedule, and quality

7 The Unfinished Revolution The first software crisis (the software factory regime) The second crisis (the market regime) system architecture reflects technology market design for change design supply chains design in the face of misfits design to technology competence sustaining competence design as exploration accommodating the process singularity

8 Component Space Source of software components Environments into which components are deployed and in which they are executed Aspects of a system implemented by the components

9 Framework v. Platform Host component-VM host-OS Does the method assume a component virtual machine?

10 Commercial v. Custom Source component-VM host-OS Does the method emphasize specification of components or assembly of preexisting components? (If preexisting then commercial source) commercialcustom

11 Application v. Infrastructure infrastructure application component-VM host-OS customcommercial Does the method focus on building applications or infrastructure?

12 Component/Method Space component-VM host-OS customcommercial application infrastructure Custom infrastructure: for all intents a black hole (projects that enter never escape)

13 Component/Method Space component-VM host-OS custom commercial application infrastructure UML Components & Component Factory both assume use of a framework and focus on component specification for business applications

14 Component/Method Space application customcommercialcomponent-VM host-OS Catalysis does not assume a framework but neither does it directly address enterprise system needs. It is application focused. infrastructure

15 Component/Method Space component-VM host-OS custom commercial application infrastructure The book I am writing with Hissam and Seacord focuses on design problems that are dominated by commercial software components

16 Component/Method Space custom commercial application This is an area that is just emerging (e.g. component families for EJB™). No methods yet, but they will be needed soon; they share some characteristics of COTS components and e.g. UML Components host-OS infrastructure component-VM

17 Component/Method Space component-VM host-OS customcommercial application infrastructure This area is still science fiction.There is research in “programmable middleware,” but this is a remote possibility for near-term commercial use.

18 Component/Method Space component-VM host-OS application infrastructure customcommercial

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