Abstract
A new approach is outlined for analysing the field reliability of the mechanical items which are under preventive maintenance.A failure-mechanism model is obtained directly from the field data, by a strict interpretation discriminating the informations concerned about the failures and prefailure defects or abnormalities, recorded in the conventional reports. It can be approximated by a known distribution and conveniently used for data analysis. The validity of this macroscopic model is shown in the applications to several cases of actual data of the marine products.The approach does not require any prior knowledge of the distribution, and Pandit called it “Data Dependent Systems Approach” in his Tool-life investigations.
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