Even after taking all appropriate steps to produce a high integrity system some remaining faults will remain how would you ensure system safety and reliability in practical approach
Answers
Answer:
ㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤ
Answer:
Design for reliability is a collection of techniques that are used to modify the initial design of a system to improve its reliability. It appears to the panel that U.S. Department of Defense (DoD) contractors do not fully exploit these techniques. There are probably a variety of reasons for this omission, including the additional cost and time of development needed. However, such methods can dramatically increase system reliability, and DoD system reliability would benefit considerably from the use of such methods. This chapter describes techniques to improve system design to enhance system reliability.
From 1980 until the mid-1990s, the goal of DoD reliability policies was to achieve high initial reliability by focusing on reliability fundamentals during design and manufacturing. Subsequently, DoD allowed contractors to rely primarily on “testing reliability in” toward the end of development. This change was noted in the 2011 Annual Report to Congress of the Director of Operational Test and Evaluation (U.S. Department of Defense, 2011b, p. v):
[I]ndustry continues to follow the 785B methodology, which unfortunately takes a more reactive than proactive approach to achieving reliability goals. In this standard, approximately 30 percent of the system reliability comes from the design while the remaining 70 percent is to be achieved through growth implemented during the test phases.
This pattern points to the need for better design practices and better system engineering (see also Trapnell, 1984; Ellner and Trapnell, 1990).