Failure modes must be assigned a failure percentage (or failure mode ratio) prior to performing analyses. The percentages are expressed as a fraction of the entire object's failure rate.
Choose the Failure Modes tab within the context panels.
3
Find the failure mode, and double-click on the failure mode percentage in the second column (shown by the cursor in the picture above).
4
Once the new percentage is entered, press ENTER or click away from the field to complete the entry.
At the bottom of the Percent column is a number representing the unapportioned percentage (remainder) of object failures. When the percentages assigned to a single object's failure modes are less than or equal to 100%, this number is green. If the total percentages exceeds 100%, however, then this number will be colored red (indicating an over-apportionment).
If the percentages assigned to an object's failure modes add up to 100%, then it is assumed that all of the ways in which that object can fail have been accounted for. If, however, the sum of the percentages is less than 100%, eXpress analyses will assume that the unassigned portion of the object's failure probability is associated with a non-specified (and non-detected) failure mode. If the percentages total more than 100%, eXpress analyses will adjust the values (keeping the same proportions between failure modes) so that they add up to 100%.
