Discussion of How to Reach a Root Failure Point in Open Systems Problem Using Function Chain

Abstract

Discussion how to reach a root failure point in open systems problem. In most case, the analyzing process depends on the experiences of support engineers, but there is no known way for trouble shooting in such circumstance. The function chain method enables to draw down a problem visually to show the direction of analyzing process. It also provides efficient manner to drill down the problem to detail of failure point. Secondary we propose the method how to judge whether the components on the function chain have been failed or safe. It stands on to compare the log information that captured pre and post of the problem. Finally, we show the efficiency of function chain by analyzing the actual open systems problem reports. The result proofs that there is a superiority of the function chain with comparison method rather than Fault Tree Analysis. Also, it shows the function chain method reduces the number of analyzed components. There is a possibility that one function chain has multiple failure points. However, the majority of function chains have a single failure point. Therefore, in this study, we only discuss the single failure problem.