1. IS301 – Software Engineering mailto:mkabay@norwich.edu V: 802.479.7937
Software Processes
IS301 – Software Engineering
Lecture # 4 –
M. E. Kabay, PhD, CISSP
Assoc. Prof. Information Assurance Division of Business & Management, Norwich University V:
M. E. Kabay, PhD, CISSP
Copyright © 2003 M. E. Kabay All rights reserved.

2. Objectives To introduce software process models
To describe three generic process models and when they may be used
To describe outline process models for requirements engineering, software development, testing and evolution
To explain the Rational Unified Process model
To introduce CASE technology to support software process activities

3. Topics covered Software process models Process iteration
Process activities
The Rational Unified Process
Computer-aided software engineering
Today I will suppress most of the slides we examine and focus on only a few critical points. Use the entire set of slides as a study guide and aid to review.

4. Copyright © 2003 M. E. Kabay. All rights reserved.
The software process
A structured set of activities required to develop a software system
Specification;
Design;
Validation;
Evolution.
A software process model is an abstract representation of a process. It presents a description of a process from some particular perspective.
Copyright © 2003 M. E. Kabay All rights reserved.

5. Generic software process models
The waterfall model
Separate and distinct phases of specification and development.
Evolutionary development
Specification, development and validation are interleaved.
Component-based software engineering
The system is assembled from existing components.
There are many variants of these models e.g. formal development where a waterfall-like process is used but the specification is a formal specification that is refined through several stages to an implementable design.
Copyright © 2003 M. E. Kabay All rights reserved.

6. Copyright © 2003 M. E. Kabay. All rights reserved.
Waterfall model
Copyright © 2003 M. E. Kabay All rights reserved.

7. Evolutionary development

8. Reuse-oriented development

9. Incremental development

10. Spiral model of software process
Copyright © 2003 M. E. Kabay All rights reserved.

11. The requirements engineering process

12. The software design process

13. The debugging process

14. The testing process

15. Testing phases

16. System evolution

17. RUP phase model

18. Computer-aided software engineering
Computer-aided software engineering (CASE) is software to support software development and evolution processes.
Activity automation
Graphical editors for system model development;
Data dictionary to manage design entities;
Graphical UI builder for user interface construction;
Debuggers to support program fault finding;
Automated translators to generate new versions of a program.

19. Functional tool classification
Copyright © 2003 M. E. Kabay All rights reserved.

20. Activity-based tool classification

21. Tools, workbenches, environments

22. Homework Required: By Wednesday 15 Sep 2004
Submit written responses to these questions:
4.1 (8 pts)
4.5 (4 pts)
4.6 (5 pts)
Optional:
By Wednesday 22 Sep 2004
Answer any or all of questions 4.2, 4,3, 4.4 or 4.8 for 2 pts each.

23. Copyright © 2003 M. E. Kabay. All rights reserved.
DISCUSSION
Copyright © 2003 M. E. Kabay All rights reserved.