PMTBF

For reliability growth data analysis only.

Description: Returns the projected MTBF, based on the Crow Extended model.

Syntax: PMTBF(Data_Src, [Conf_Level])

• Data_Src is the source data sheet from which the value is taken.

• Conf_Level is the percentage (entered as a decimal value) for the confidence bounds. It is an optional value and, if specified, must be greater than 0 and less than 1.

Remarks:

• The Data_Src can be one of the following values:

  • A default data source selected from the Data Source Index drop-down list.

  • A data sheet name (e.g., "Weibull!Folio1!Data1").

  • A variable name defined in the Defined Names window (e.g., datasource).

Example:

• PMTBF("RGA!Folio1!Data1",0.8)