Reliability Element Status and Failure Mode Histories and Statistics

In addition to the analysis and results provided on the Results tab for a reliability element, in some cases it may be of value to view the time history and probability distribution A mathematical representation of the relative likelihood of a variable having certain specific values. It can be expressed as a PDF (or a PMF for discrete variables), CDF or CCDF. of the status of the element.

The status output (the primary output For an element with multiple outputs, the output that has the same name as the element. for the element) is an integer that indicates the Status of the component. At any given time, it takes one of the following values:

Output Value	Component Status
0	All requirements are met, the component is not failed, it is turned on and operating.
1	A preventive maintenance (that makes the component inoperable) is underway.
2	Internal requirements are not met.
3	External requirements are not met.
4	Element is not turned on.
5	Parent element is not operating.
6	An operating Resource Something that has a limited supply (e.g., spare parts, fuel, skilled personnel, money) and is required in order for elements of the modeled system to carry out certain actions. requirement is not met.

If more than one status value applies at any given time, then the smallest value is output.

Plotting a time history of a component's status can provide insight into how the component behaves through time. A distribution result of the status at any particular point in time (e.g., end of realization A single model run within a Monte Carlo simulation. It represents one possible path the system could follow through time.) could also be useful in some circumstances. This distribution, of course, will be discrete (rather than continuous).