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| Tekijä: | Baker, R.D. |
| Otsikko: | Testing the efficacy of preventive maintenance |
| Lehti: | Journal of the Operational Research Society
1991 : JUN, VOL. 42:6, p. 493-503 |
| Asiasana: | MAINTENANCE SERVICE INDUSTRIES SCHEDULING |
| Kieli: | eng |
| Tiivistelmä: | The aim of the paper is to find out from the data whether planned preventive maintenance /p.p.m/ has any effect on the subsequent sequence of times to failure, or on the cost of the failures. The most convincing way to do this is to change the frequency of p.p.m., and see what happens. Requirements of satisfactory statistical tests are discussed, and a test based on partial likelihood is introduced. Illustrating practical applications, the test is used to analyse published data on failure of submarine engines, and a dataset collected during a recent study of hospital equipment. |
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