Presentation on theme: "Questions on failure codes 1.Why do we collect information, generally? 2.Why do we collect failure codes, specifically? 3.What is a failure code? 4.How."— Presentation transcript:
Questions on failure codes 1.Why do we collect information, generally? 2.Why do we collect failure codes, specifically? 3.What is a failure code? 4.How will failure codes support our reliability and supportability goals?
1. Why do we collect information, generally? to improve (measurably) readiness, survivability, and performance safely, at lowest cost by assessing: 1.Failure Data 2.Inspection findings 1.Adjust PM task intervals & PM tasks 2.Assess desirability of additional PM tasks 3.Eliminate unnecessary (over intensive) PM tasks 4.Improve failure response 5.Redesign and Design 6.Verify contractual KPIs (ISSC) In order to This is a continuous process!
2. Why do we collect failure codes? We collect failure codes: –When we know precisely how the compilation and analysis of their instances, will enable us –to perform one or more of the six activities in the blue box.
3. What is a failure code? It is the answer to the question: –“What event caused the loss (or potential loss) of capability?” Usually contains a noun, a verb, and a “due to” clause. (Bolt disintegrates due to corrosion.) Failure Mode = Failure Mechanism = Failure Cause = Failure Reason = the event that caused the failure.
4. How will failure codes attain required reliability and supportability goals? When selecting a failure cause we encounter a recurring non-trivial, two-dimensional problem: 1) To what depth?, and, 2) To what degree of detail? shall we consider / record the failure cause (code)? Unless resolved, compiled failure code instances will: – scatter in both dimensions. It is the well known “failure code problem”. RCM offers a solution to the failure code problem
Reliability analysis requires that we record: not only the instance (the fact) of the failure mode, but also the nature of its occurrence. How did the life cycle of (this instance of) the failure mode end? 1.By functional failure?, 2.By potential failure?, or 3.By suspension? The Event type The combination of the Failure mode (i.e code) plus the Event type unleashes the power of Reliability Analysis, e.g. …