CS8113g: Introduction

1
Software Life Cycles
Process 1/11/99
2
Agenda

• Questions
• Can you access notes?
• C2000 consent form
• Project ideas
• Engineering for software
• Life cycle models

3
Project ideas

• Look to Web pages
• Freedom of choice
• topic
• development platform

4
Introducing the Author

• Shari Pfleeger
• Chapter 1 of book is good overview of what we
  will study.

5
Engineering and Software

• Origins of SE
• 1968 NATO conference in Germany
• Software crisis

6
Definition of SE

• As defined in IEEE Standard 610.12
• (1) The application of a systematic, disciplined,
  quantifiable approach to the development,
  operation, and maintenance of software that is,
  the application of engineering to software.
• (2) The study of approaches as in (1).

7
Elements of SE

• Pfleeger
• analysis - synthesis
• methods/techniques
• tools
• procedures
• paradigm

8
Science, Engineering Art

• In Computing
• Science
• Engineering
• Art/Craft

9
A Dual Emphasis

• Process
• how things are done
• Product
• what is done

10
Software Life Cycles

• Having a defined process is essential
• Maturity of the process is some gauge of success
  of organization

11
Main elements to process

• W
• H
• O

12
Examples

• Waterfall
• Rapid prototyping
• Evolutionary
• Incremental
• Spiral
• V model Microsoft Bazaar

13
The waterfall model

• Pfleeger p. 48 origin in 70s

14
Waterfall problems
15
Patching the waterfall

• Iterate

16
Rapid Prototyping

• Customer requirements are hard.
• Build a quick system to better elicit
  requirements.
• Throw it away

17
Evolutionary models

• always have a deliverable product
• Incremental
• build in independent stages
• deliver increments
• Iterative
• always deliver full system
• Boehms spiral model is example

18
The spiral model

• Development Risk management

19
Other models

• V model
• relationship between development and testing
• Microsoft
• synchronize and stabilize
• frequent builds, many testers
• Bazaar
• well visit this later

20
3302 process model

• What is it most like?