Module 14 - Application Software

Question 1

What are the three types of software?

Answer 1

1. Application program
2. Utility software
3. Embedded software

Question 2

What are the three language types?

Answer 2

1. Full variability languages
2. Limited variability languages
3. Fixed programming languages

Question 3

When must you use IEC 61508 for your software?

Answer 3

1. When using a FVL

2. When writing software for SIL4

Question 4

Describe the V model

Answer 4

The V model is the progressive decomposition of SIS safety requirements into application program requirements and implementation. After the deepest development phase the software Is back-tested progressively in parts until the entire system is tested as a whole.