C = CvMv + CwMw
Consequently,
From the above relation, the properties of cost ratio c are as follows:
1] If p=0, the maintenance cost ratio c becomes one. This result is very natural.
2] If p=1, the maintenance cost ratio c is (1+Te/Td)/l which suggests that the cost ratio 1 and the relation between Te and Td are very important from the point of cost view.
4. CONCLUDING REMARKS
In this paper, first we summarize our concepts on the maintenance methods under the diagnosis which have been already investigated, and then discuss how the fault diagnosis success ratio provides effect on CM, and the relationship between both.
Next, from the standpoint of the reliability improvement ratio, the maintenance number, the maintenance cost, we introduce new theoretical results to evaluate CM and PM. Then the characteristics of these results obtained newly are investigated in detail, and consequently, might be found to be almost equivalent to our experiments and many reports on the maintenance techniques. It suggests that our new results on monitoring maintenance might be valid. From now, these results might be applied in various kinds of maintenance in order to evaluate maintenance methods or techniques used in the fields. Moreover, after that we want to make clear the relationship of CM and PM in the case of other distribution.
Reference
[1] .680-690, 1960.
[2] K. ISHIGE and M. HORIGOME: Relationship between fault diagnosis success ratio and monitoring maintenance, IEICE A Vol. J82-A, N0.8, pp. 1409-1414, 1999 (In Japanese).
[3] M. HORIGOME and Y. KAWASAKI: Characteristics of monitoring maintenance and definition of diagnosis success ratio, PSAM'96 ESREL'96-PSAM-III, pp. 1097-1102, 1996.
[4] Y. KAWASAKI: Study on monitored maintenance, Research report of Tokyo Univ. of Mercantile Marine, pp. 145-164.1976 (In Japanese).
[5] 74-14, 1973 (In Japanese).
[6] K. ISHIGE and M. HORIGOME: Maintenance analysis due to success ratio of defect diagnosis, REAJ, 1999 (In Japanese).
