risk assessment

Faurecia.

RISK = Exposure x Severity x Probability

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Exposure

The frequency of exposure indicates how often a dangerous

situation can arise. It could be exposure to a toxic chemical or

the working and handling of a dangerous machine.

Exposure	Factor
Very Rarely (< 1/year)	0.5
Rarely ( few times per year)	1
Sometimes ( once or twice month)	2
Now and then ( 1/week)	3
Frequently ( 1/day)	6
Continuous (>2/day)	10

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SEVERITY

SEVERITY *	Factor
Minor (injury without lost time/work restriction) FR2	1
Major (injury with external medical treatment/work restriction) FR1	4
Serious (injury with lost time) FR0	7
Critical (one fatality – instantly or afterwards) FR0	15
Disaster (multiple fatalities – instantly or afterwards) FR0	40

Take into account the measures defined, and based on those,

determine the realistic maximum severity factor (based on practical

case scenario)

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PROBABILITY

The probability indicates how big the chances are that the effect (as defined in

the Severity table) might indeed occur. This is a subjective judgment, the most

difficult assessment to make.

PROBABILITY	Factor
Virtually Impossible (>20 y, once in a life time, only theoretical case )	0.2
Conceivable but improbable, once in a career (1/20y)	0.5
Improbable/borderline case, (1/10y)	1
Unusual, One can think of a (unusual) scenario (1/3y)	2
possible (once every 6 months)	3
To be expected (once per week)	10

As a guideline, if you can think of a scenario were the considered effect will

occur, the probability factor typically equals 3.

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CLASSIFY INTO RISK CATEGORY:

By calculating the hazard score it is then possible to classify it into the

correct risk score category and thereby determining which possible

urgent plan of action is to be taken.

Risk score（R）	Inerpretation	Priority for the measuresto be taken
<20	Very limited risk - acceptable	4
20 to 70	Measures required (in 6m)	3
70 to 200	Immediate measure required	2
> 200	Stop work until measures taken	1

Only R<20 can result in an acceptable situation where nothing

(additional) needs to be done. However as long as S >= 4 additional

measure are strongly recommended.

Faurecia.

我公司在用的风险评价计算方法，比较切合实际。

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