A Simulation Model for Machine Efficiency Improvement Using Reliability Centered Maintenance: Case Study of Semiconductor Factory

Table 5

Cumulative percentage of occurrence of RPN values.

ID	Component	RPN	Probability of occurrence of RPN value	Cumulative % of occurrence of RPN value
14	Test socket	287.51	0.1036	10.36%
13	Lead pusher	272.00	0.0980	20.16%
3	Picker cylinder	268.33	0.0967	29.83%
1	Vacuum pad	268.22	0.0967	39.50%
12	Inserter	260.56	0.0939	48.89%
19	Linear guide	253.00	0.0912	58.01%
2	Ejector filter	235.06	0.0847	66.48%
4	Solenoid valve	179.75	0.0648	72.96%
7	Timing belt	176.00	0.0634	79.30%
17	Unloader preciser	150.62	0.0543	84.73%
5	Pitch ring	117.33	0.0423	88.96%
16	Loader preciser	62.91	0.0227	91.22%
6	Pitch bearing	50.81	0.0183	93.06%
18	Unloader sortable	43.85	0.0158	94.64%
15	Loader buffer	31.51	0.0114	95.77%
8	Test tray	31.41	0.0113	96.90%
10	Motor shaft	30.67	0.0111	98.01%
11	Motor stator	29.63	0.0107	99.08%
9	Air tubing	18.96	0.0068	99.76%
20	Ball screw	6.67	0.0024	100%