Table 1 FMEA scale for occurrence11.

From: Failure mode identification and effects analysis of mobile X-ray machine using selected MADM techniques

Rating

Probability of occurrence

Possible Failure Rate

10

Extreme

≥ 1:02

9

Very High

1:03

8

repeated Failure

1:08

7

High

1:20

6

Moderately

1:80

5

Moderate

1:400

4

Relatively low

1:2000

3

Low

1:15000

2

Remote

1:150000

1

Near to Impossible

≤ 1:1,500,000

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