alt.fit {WeibullR.ALT}

Modify an "alt" Object Establishing a Accelerated Life Relationship Fit

Description

This function generates a linear fit to the median or characteristic life estimates of the provided data sets.

Usage

alt.fit(x, omit_set=0)
	

Arguments

x

An "alt" object as modified by "alt.parallel".

omit_set

An optional vector listing any data set(s) that judged to be excluded from the accelerated life relationship determination.

Details

A linear model fit is made of the median or characteristic life estimates of applicable data sets weighted by number of failure points per each.

The returned object can be plotted using S3 function "plot.alt" placing the failure points (taking intervals as mean time points) in accordance with the specified alt.model relationship. The fitted relationship line will be displayed as well as the default percentile "c(10,90)" lines.

Value

The input object will be returned with the addition of a "$alt_coef" element.

References

Wayne Nelson, (1990) "Accelerated Testing", Wiley-Interscience, New York

William Q. Meeker and Luis A. Escobar, (1998) "Statistical Methods for Reliability Data", Wiley-Interscience, New York

Pascual F., Meeker W., Escobar L. (2006) Accelerated Life Test Models and Data Analysis. In: Pham H. (eds) Springer Handbook of Engineering Statistics. Springer Handbooks. Springer, London. https://doi.org/10.1007/978-1-84628-288-1_22