ABSTRACT

In this case study, a reliability engineer at an auto parts manufacturer wishes to test whether the reliability of a car bumper depends on its weight and the machine that makes it.

Section 11.1 discusses the failure time data for car bumpers of three different weights and from two different machines. Section 11.2 illustrates the analysis using Minitab. Section 11.3 gives an additional example with four different weights and three different machines. Finally, Section 11.3 gives a concluding remark.