What is the RPN

RPN is the frequency and severity of the incident and product detection level, the more its numerical potential problems more serious, the measure of possible process defects, so that possible preventive measures can be taken to reduce the number of key process change, make the process more reliable. Correction of the process, first of all, should focus on the most popular and the highest degree of risk.

RPN in the worst case is 1000, in the best case is 1, the best way to determine where to start is to use the pareto chart of RPN, screening of the cumulative level is far less than 80% of the project.

Recommend a responsible plan and completion date, the ultimate goal of the recommended scheme is to reduce one or more levels. For some serious problems to often consider saving scheme, such as:

A product with risk grade 9 or 10 on the influence of failure patterns;
A product failure mode/reason events, and a high severity;
A product has a high RPN value and so on.

After all rescue measures and implement, to allow a stable period, then it should also be on the revision of the frequency and severity of the incident to reconsider and sorting and testing level.