184
5.2.3.1 Perhitungan
dan
Perbandingan
Reliability
nilai
MTTF
Pada
Komponen
Idler
Simulasi
perhitungan reliability
dilakukan
selama
720
jam
atau
selama
satu
bulan
untuk
melihat apakah ada pengaruh perubahan terhadap reliability
antara
sebelum
menerapkan dan
sesudah
menerapkan preventive
maintenance
yang
diusulkan.
Perhitungan dilakukan dengan target reliability sebesar 85% :
Tabel 5.48 Simulasi Perhitungan Reliability Komponen Idler
t
(t-µ)
(t-µ)/s
F(t-µ)/s
R(t)
n
R(T)^n
R(t-nT)
Rm(t)
25
-327.0750
-2.2959
0.0108
0.9892
0
1.0000
0.9892
0.9892
50
-302.0750
-2.1204
0.0170
0.9830
0
1.0000
0.9830
0.9830
75
-277.0750
-1.9449
0.0259
0.9741
0
1.0000
0.9741
0.9741
100
-252.0750
-1.7694
0.0384
0.9616
0
1.0000
0.9616
0.9616
125
-227.0750
-1.5939
0.0555
0.9445
0
1.0000
0.9445
0.9445
150
-202.0750
-1.4185
0.0780
0.9220
0
1.0000
0.9220
0.9220
175
-177.0750
-1.2430
0.1069
0.8931
0
1.0000
0.8931
0.8931
200
-152.0750
-1.0675
0.1429
0.8571
0
1.0000
0.8571
0.8571
204
-148.0750
-1.0394
0.1493
0.8507
1
0.8507
0.9933
0.8450
225
-127.0750
-0.8920
0.1862
0.8138
1
0.8507
0.9899
0.8421
250
-102.0750
-0.7165
0.2368
0.7632
1
0.8507
0.9842
0.8372
275
-77.0750
-0.5410
0.2942
0.7058
1
0.8507
0.9758
0.8301
300
-52.0750
-0.3655
0.3574
0.6426
1
0.8507
0.9639
0.8200
325
-27.0750
-0.1901
0.4246
0.5754
1
0.8507
0.9476
0.8061
350
-2.0750
-0.0146
0.4942
0.5058
1
0.8507
0.9260
0.7877
352.075
0.0000
0.0000
0.5000
0.5000
1
0.8507
0.9239
0.7860
375
22.9250
0.1609
0.5639
0.4361
1
0.8507
0.8981
0.7640
400
47.9250
0.3364
0.6317
0.3683
1
0.8507
0.8634
0.7345
425
72.9250
0.5119
0.6956
0.3044
2
0.7237
0.9907
0.7169
450
97.9250
0.6874
0.7541
0.2459
2
0.7237
0.9852
0.7130
475
122.9250
0.8629
0.8059
0.1941
2
0.7237
0.9773
0.7073
500
147.9250
1.0384
0.8504
0.1496
2
0.7237
0.9660
0.6991
525
172.9250
1.2138
0.8876
0.1124
2
0.7237
0.9505
0.6879
550
197.9250
1.3893
0.9176
0.0824
2
0.7237
0.9298
0.6729
575
222.9250
1.5648
0.9412
0.0588
2
0.7237
0.9031
0.6535
600
247.9250
1.7403
0.9591
0.0409
2
0.7237
0.8694
0.6292
625
272.9250
1.9158
0.9723
0.0277
3
0.6156
0.9913
0.6103
650
297.9250
2.0913
0.9817
0.0183
3
0.6156
0.9863
0.6072
651
298.9250
2.0983
0.9821
0.0179
3
0.6156
0.9860
0.6070
652
299.9250
2.1053
0.9824
0.0176
3
0.6156
0.9858
0.6069
653
300.9250
2.1123
0.9827
0.0173
3
0.6156
0.9855
0.6067
675
322.9250
2.2668
0.9883
0.0117
3
0.6156
0.9788
0.6026
700
347.9250
2.4423
0.9927
0.0073
3
0.6156
0.9681
0.5960
720
367.9250
2.5826
0.9951
0.0049
3
0.6156
0.9567
0.5890
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