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Weibull++ Life Data Folio

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 analysis, you can go directly to the topic of interest.

How to Use the QCP

  1. Choose a metric in the Calculate area. (Note: To calculate the Parameter Bounds, you must first select a type from the Bounds drop-down list.)

  2. If applicable, use the Units drop-down list to specify the units for 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, in a life data folio, you could enter the failure/suspension times in hours but then calculate the reliability for 1 year 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.

Confidence bounds

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

Note: Confidence bounds calculation options are disabled when the underlying data type is free-form data.

  1. Make any required inputs in the Input area.

  2. Click Calculate. The calculated value(s) will always be displayed in the results area at the top of the window, and clicking the Report button displays a summary of the current calculation input/output in the Results window.  You can also use the Options drop-down list to configure other settings, including:

QCP with Captions on
QCP window with captions on.

QCP with Captions off
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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