Determination of Optimal Warranty Period with Preventive Maintenance Actions for Items from Heterogeneous Populations

Table 5

Optimal set of parameters and the corresponding minimum ECR for different settings of repair time limit and shape parameter for power law process to investigate the optimal length of warranty period when and

	ECR		ECR		ECR
1/12	1.20	2.9391	1.21	2.9389	1.21	2.9372
2/12	1.07	2.9871	1.06	2.9869	1.05	2.9852
3/12	1.00	3.0301	0.97	3.0296	0.95	3.0275
4/12	0.95	3.0688	0.92	3.0679	0.89	3.0650
5/12	0.91	3.1038	0.88	3.1021	0.85	3.0984
6/12	0.88	3.1354	0.85	3.1330	0.82	3.1282
7/12	0.85	3.1642	0.82	3.1609	0.79	3.1550
8/12	0.83	3.1903	0.80	3.1861	0.77	3.1792
9/12	0.82	3.2141	0.78	3.2090	0.76	3.2011
10/12	0.80	3.2357	0.77	3.2297	0.74	3.2208
11/12	0.79	3.2555	0.76	3.2486	0.73	3.2388
12/12	0.78	3.2735	0.75	3.2658	0.72	3.2551