Lecture 1 (Part II)

Question 1

Define SEP

Answer 1

A structured set of steps taken in order to build a software system.

Question 2

What are the common activities of SEP?

Answer 2

**Acronym: SDITM

Common activities of SEP are:
- Specification
- Design
- Implementation
- Test & Validation
- Maintenance & Evolution

Question 3

What are ‘Software Process Models’ ?

Answer 3

Software Process Models are abstract representations of processes. They provide descriptions of processes from a particular perspective.

Question 4

Software Process Descriptions

Answer 4

• Activities: the steps defined by a model
• Products: the outcomes of a process activity
• Roles: responsibilities for the people involved in the process
• Pre & Post conditions: which statements are true before and after a process activity has completed

Question 5

What are the different types of Software Process Models?

Answer 5

Types:

1. Plan-driven: planning is done in advance and progress is measured against this plan. Difficult to change requirements.
2. Agile: Incremental planning and plan is updates based on changing customers requirements.

IRL, a process uses both plan-drive and agile methods.

Examples are:
1. Waterfall: plan-driver, sequential activities, separate and distinct activities.

2. Incremental: plan-driven or agile, activities are interleaved.
3. Reuse oriented: plan-driven or agile, software assembled from existing components.