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Description: Returns the value of the MTTF (Mean Time to Failure) at the specified stress level(s).
Syntax: AMEAN_S(Data_Src, [Confidence Level], [SL_1])
Data_Src is the source data sheet from which the value is taken.
Confidence Level is the percentage (entered as a decimal value) for the 1-sided confidence bounds.
SL_1 is the stress level, for each stress type, at which the MTTF is calculated. The number of stress level inputs is determined by the number of stress types in the specified data sheet.
Remarks:
The Data_Src can be one of the following values:
If using a default data source, it must be either 1, 2, 3 or 4, as selected from the Data Source Index drop-down list.
It can take a data sheet name (e.g., "Folio1!Data 1").
It can take a variable name defined in the Defined Names window (e.g., datasource).
Confidence Level is an optional value and, if specified, must be greater than 0 and less than 1.
SL_1 is an optional value. The default value is the use stress specified in the Use Stress Level window, but you can change the value to any desired number. If the data sheet uses the Cumulative Damage model, you can also use a stress profile for this value.
Example:
AMEAN_S("Folio1!Data 1",0.9,300) = 28.7635
Note that this value will vary depending on the source data set.
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