Table 5.

Reliability function and failure rates before and after performing preventive maintenance of the machine Alba 26.

t (time)	${\widehat{R}}_{ML}\left(t\right)$	${\widehat{R}}_{PM}\left(t\right)$	$\widehat{R}\left(t-nk\right)$	${\widehat{h}}_{ML}\left(t\right)$	${\widehat{h}}_{PM}\left(t\right)$
0	1.00000	1.00000	1.00000	0.00000	0.00000
1	0.97177	0.97177	0.97177	0.05276	0.05276
2	0.90241	0.90241	0.90241	0.09460	0.09460
3	0.80513	0.80513	0.80513	0.13312	0.13312
4	0.69193	0.69193	0.69193	0.16963	0.16963
5	0.57376	0.57376	1.00000	0.20471	0.00000
6	0.45963	0.55756	0.97177	0.23870	0.05276
7	0.35606	0.51776	0.90241	0.27180	0.09460
8	0.26695	0.46195	0.80513	0.30416	0.13312
9	0.19383	0.39700	0.69193	0.33589	0.16963
10	0.13638	0.32920	1.00000	0.36707	0.00000
11	0.09304	0.31991	0.97177	0.39776	0.05276
12	0.06156	0.29707	0.90241	0.42801	0.09460
13	0.03953	0.26505	0.80513	0.45787	0.13312
14	0.02464	0.22778	0.69193	0.48737	0.16963
15	0.01492	0.18888	1.00000	0.51653	0.00000
16	0.00877	0.18355	0.97177	0.54540	0.05276
17	0.00501	0.17045	0.90241	0.57398	0.09460
18	0.00278	0.15207	0.80513	0.60229	0.13312
19	0.00150	0.13069	0.69193	0.63036	0.16963
20	0.00079	0.10837	1.00000	0.65820	0.00000
21	0.00040	0.10531	0.97177	0.68581	0.05276
22	0.00020	0.09780	0.90241	0.71322	0.09460
23	0.00010	0.08725	0.80513	0.74044	0.13312
24	0.00005	0.07499	0.69193	0.76747	0.16963