Quality assessment of reliability engineering systems

Abstract

Quality and quality assessment are key indicators in many fields. There exist various interpretations of the quality concept, such as technical, legal, and economic definitions. The fundamental aspect of technical systems is the quality problem, and there are different ways to assess quality. This paper examines the relationship between quality and reliability that forms the basis of the safety property and offers a quality assessment that relies on system reliability characteristics using a mathematical methods. Reliability is influenced by random concepts and events, such as the moment of failure. Costly long-term reliability tests on a large number of products are required to determine whether a particular object is suitable. As an example, the reliability of the redundant recoverable system is considered. Reliability influences the security property. Failure of an object decreases the values of the remaining properties dramatically. The theory of random processes, including the use of the theory of Markov processes, is a rational mathematical technic for solving reliability problem. Quality assessment tasks can also be attributed to management tasks, which are becoming increasingly popular in various areas. As an example, the reliability of the redundant recoverable system is considered. The paper uses the generally accepted concepts of the probability, reliability function, failure rate, etc.

Optimal maintenance tasks taking into account cost indicators

“…This is a system maintenance strategy where a complete system update begins after a failure occurs. 𝜉𝜉 − random system uptime 𝐹𝐹(𝑡𝑡) = 𝑃𝑃{𝜉𝜉 > 𝑡𝑡}, 𝑇𝑇 𝑐𝑐𝑐𝑐 = 𝑀𝑀𝜉𝜉 𝑀𝑀𝑋𝑋 (0) = 𝑇𝑇 𝑐𝑐𝑐𝑐 𝑀𝑀𝑋𝑋 (1) = 𝑀𝑀 𝜁𝜁 = 𝑇𝑇 п 𝑀𝑀𝑋𝑋 (2) = 𝑀𝑀 𝜂𝜂 = 𝑇𝑇 𝑎𝑎п .…”

“…The reliability of technical systems is mapped out during development and production and realised during operation. Reliability strongly depends on the system's operating conditions [1,2]. Maintenance involves system support and maintenance operations [3,4].…”