Maintenance

Question 1

What are triggers of Software Maintenance?

Answer 1

• bug fix (by far most common)
• changing requirement
• new feature request
• evolving hardware
• evolving software architecture
• evolving software stack

Question 2

How to reduce sensitivity to changes triggered by hardware?

Answer 2

by suitable architecture or good use of design patterns

Question 3

What are the Software Product Line Engineering (SPLE) Priciples?

Answer 3

1. feature space design is separated from software design and performed beforehand
2. same feature not implemented more than once
3. possible to locate the code to a given feature

Goal:
-> avoid having to maintain each variant separately

Question 4

suggested approaches to SPLE

Answer 4

• conditional activation of code via pragma or macro (most common)
• aspect-oriented programming
• feature-oriented programming
• delta-oriented programming
• variability modules

Question 5

Challanges in SPLE

Answer 5

• code with many pragmas hard to understand
• feature interaction may occur and hard to detect
• hard to avoid code duplication