ABSTRACT
The heart of reliability is the analysis of data, from which desired reliability parameters can be calculated. These parameters are calculated from testing throughout the product development process. Reliability parameter calculation assumes the product is in the useful life period of the bathtub curve. Graphical analysis is a way of looking at test data or field information. Several type of graphical analysis is advantageous in reliability analysis: Pareto Analysis, Graphical Plotting and Weibull Analysis. Pareto analysis is a plot of individual failures versus the frequency of the failures. The individual failures are listed on the x-axis and the frequency of occurrence on the y-axis. Weibull paper is a logarithmic probability plotting paper constructed with the y-axis representing the cumulative probability of failure and the x-axis representing a time value, in hours or cycles. Data points are established from failure data, with the failure times arranged in increasing order or value of occurrence.
