Choose the Time Units for an Analysis

The time units are used for expressing time values for calculations performed within an analysis. For example, a calculation may indicate the amount of time that lapsed between a failure event and the end date of the analysis period. This value would be expressed in the Time Units for the analysis.

Your Time Units selection will depend on what type of data you are using and what type of analysis you are performing. For example, in an analysis that shows the distribution of failures for a number of Assets over many years, years might be an appropriate unit of time. For an analysis designed to evaluate failures for a single Asset within a very specific time period, a smaller unit of time would be appropriate. For this reason, you can choose the Time Units that are most appropriate for a given analysis.

Steps

Access a Reliability Growth Analysis for which you want to modify the Time Units.
In the left pane, select the Cumulative <Measurement> Plot tab.

The Cumulative <Measurement> Plot appears in the workspace.

Note: You can also modify the analysis period for a plot via the Mean Time Between <Measurement> Plot, and <Measurement> Rate Plot tabs.
In the upper-right corner of the workspace, select Growth Options, and then select Time Units.

The Select Time Units window appears.
In the Operating Time Units list, select Hours, Days, Weeks, Months, Quarters, or Years. The default value is Days.
In the Downtime Units list, select Hours, Days, Weeks, Months, Quarters, or Years. The default value is Days.
Select OK.

The GE Digital APM system automatically recalculates the analysis based on the new time units and displays the new units on the plot pages.