Observed Data Report
 • Equal Interval Average MTBF (Mean Time Between Failures) enables you to specify a common interval size.
 • Customized Average MTBF enables you to specify cut-off points for time intervals.
 – Double-click within a table cell to change its value.
 – Right-click in the table to open a menu that enables you to add and remove rows.
 • The Intercept value is given, for historical reasons, as the intercept for a fit in the natural logarithmic scale. Specifically, the natural logarithm of Cumulative MTBF is regressed on the natural logarithm of Time to Event. The value of Intercept is the value predicted by this regression equation at log(1) = 0, where log is the natural logarithm. To obtain the intercept for a fit in terms of base 10 logarithms, divide the Intercept value by log(10). See Chapter 13 of Tobias and Trindade (2012).
 • The Slope value is the slope for a fit in either the natural or the logarithmic scale. This follows from the properties of logarithms.

Help created on 9/19/2017