Subject: ENGG961: Systems Reliability Engineering
Assignment 2: Design for Reliability
Purpose:
To learn knowledge and approaches in system reliability design and practice.
Learning objectives covered:
1. Understand and apply reliability concepts and terminology.
2. Understand and apply the basic mathematics involved in reliability engineering.
3. Understand and make use of the relationships amongst the different reliability functions.
7. Model the reliability of systems (including safety systems) using fault tree analysis, reliability block diagrams, and FMECA.
Learning Guides
In order to complete the assignment tasks, you need to read Chapter 5 to Chapter 8 given that you have learnt Chapter 1 to Chapter 4. While you are reading, you need to understand or answer the following questions:
1. How is system reliability determined? How to calculate the system reliability given that all component and subsystem failure information is clearly known.
2. Know how to calculate reliability of series system, parallel system, combined series-parallel systems.
3. Understand
the purpose of using redundancy in system reliability design,
4. What is k-out-of-n redundancy? What is the difference between k-out-of-n:G system and k-outof-n:F system? How to evaluate reliability of a redundant system?
5. What are System Structure Function, Minimal Cuts, and Minimal Paths?
6. Learn Markov chain model in system reliability modelling.
7. Learn what the Static Model is and what the Dynamic Model is in reliability modelling.
8. Know Physics-of Failure models in reliability analysis.
9. Learn reliability design methods and know how to apply them
10. How to specify system reliability? What are the factors that affect the system reliability and lifecycle cost?
11. What are the methods used in Reliability Allocation and how to use them?
12. What is FMEA and how to use it?
13. What is FTA? Know how to conduct a fault tree analysis and know how to evaluate the
Tasks:
Task 1 (23 marks)
There are a series of machines in a manufacturing line to complete a required manufacture process, see Table 1. The manufacture line is controlled by the Control Centre.