Risk = probability * severity. The two indicators of risk are probability and severity, and the relationship is multiplication.
The risk assessment standard suggested by the standard is 5X5 matrix, that is to say, the standard suggests that the probability is divided into five levels and the severity is divided into five levels, but some enterprises are willing to divide it into 4x6 matrix, especially some templates many years ago.
Of course, the judgment of probability and severity can't be subjective, but there is a certain degree of prediction in the process of new product development.
Usually, it can be estimated in the following seven ways:? —? Use relevant historical data; ? —? Predict probability by analytical methods or simulation techniques; ? —? Use test data; ? ―? Reliability estimation; ? ―? Production data; ? ―? Post-production information; ? —? Use expert judgment.
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