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Quick Calculation Pad (QCP)

The Quick Calculation Pad (QCP) provides a convenient way of calculating a variety of useful metrics. To access the tool, click the QCP icon on the Main page of the control panel.

This topic provides a general description of the QCP and how to use it in most analyses. For more focused information about the types of calculations that can be performed for a particular type of analysis/model, you can go directly to the topic of interest:

How to Use the QCP

To use the QCP, do the following:

  1. Choose a metric in the Calculate area. The metrics available depend on the data type and, in the case of the Crow Extended model, which fix strategies were implemented (i.e., BC = fixed during test or BD = delayed fix).

  2. If applicable, use the Units drop-down list to specify the units for any time values that are entered as inputs and/or displayed as results. The units in the QCP can be different from the units that were used for the data sheet. For example, you could enter the failure times in hours but then calculate the cumulative number of failures for 1 month of operation — the application will convert the times automatically based on the conversion factors specified for the database.

  3. If applicable, use the Bounds drop-down list to specify what type of confidence bounds to calculate. The following graphics illustrate the types. The ReliaWiki resource portal provides more information on the background theory of confidence bounds at: http://www.ReliaWiki.org/index.php/Confidence Bounds.

    If you select Both One-Sided, the QCP will calculate both the lower one-sided bound and the upper one-sided bound.

  4. Make any required inputs in the Input area.

  5. Click Calculate. The calculated value(s) will always be displayed in the results area at the top of the window.

Other Options


QCP window with captions on


QCP window with captions off

Under the log display, you can also click Feed to "advance the tape" or Clear to delete all data from the current log. If you click inside the log, you can copy some or all of the text to the Clipboard.

 

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