Reliability, Maintainability and Risk, 9th Edition

Appendix 5

Failure Mode Percentages

Just as the failure rates in the preceding tables vary according to a large number of parameters, then so do the relative percentages of the different failure modes. However, the following figures (which are general guide only) will provide the reader with some general information which may be of assistance in carrying out a Failure Mode Analysis where no more specific data are available. Note that the percentages, for each item, do not necessarily sum to 100% since the failure modes listed are only the major ones which are likely to have been recorded. The proportion of other minor failures (although present in the total data) may not have been recorded. Where possible failure mode proportions are listed in ...