Graphical Techniques and Methods

Abstract

GAMM (Graphical Analysis for Maintenance Management) is a method that supports decision-making in maintenance management through the visualization and graphical analysis of data. GAMM also allows the identification of anomalous behavior in equipment, derived from its own operations, maintenance activities, improper use of equipment or even as a result of design errors. As a basis for analysis, the GAMM method uses a nonparametric estimator of the reliability function using historical data, sometimes in very limited amounts. However, for successful results, experience and advanced knowledge in maintenance management are strictly necessary. In order to ease the interpretations of the GAMM method results, with the intention that the method becomes really amicable for managers, a set of basic rules have been developed. This set of rules leads to a proper and objective interpretation of GAMM results, improving the decision making.