As the risk matrix one indicates, how high a risk is.

In accordance with the technical definition by risk into axle (y) is usually indicated the probability of entrance and in the other axle (x) the effect of the damage or damage weight.

Beside the risk matrix after Nohl in the industrial safety there is to e.g. number still different one, the weight of an error in a technical application or software is etc.

Risk matrix after Nohl

Categories for the probability of entrance or probability of the taking effect of the endangerment:

• very small
• small
• means
• highly

The categories are statistically occupied during the risk evaluation "meaningfully estimated" or.

Categories for damage weight:

• easy injuries or illnesses, e.g. Bruises
• moderately severe injuries or illnesses, e.g. simple fractures
• heavy injuries or illnesses, e.g. Paraplegia
• possible death, disaster, e.g. heavy injuries of numerous humans

From the matrix from it a yardstick (1-7) is formed.

This risk yardstick is divided in three categories:

• 1-2: small risk, no risk reduction necessarily (between residual risk and threshold risk)
• 3-4: significant risk, risk reduction necessarily (in the proximity of the threshold risk to easy over it)
• 5-7: high risk, risk reduction urgently necessarily (over the threshold risk)

Related links

• Incident commission: Risk management (.pdf, 575 KB)
• Risk matrix - diagram

Risk matrix after Nohl (industrial safety):

• by the example of a school
• Risk matrix (.doc, 40 KB)

Endangerment evaluation:

• Federal Institution for industrial safety (BAuA)

Articles in category "Risk matrix"

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