MFM distinguishes between system goals in two different categories based on the nature of the concepts. One is to achieve a certain state, while the other is to avoid an undesirable state. These two can be expressed by using only one concept of goal with different logical expressions. However, the differentiation between the two concepts is the key to understand safety issues of complex system. Goals in MFM is not expressed only by the target states only, but has to be expressed by using target together with a means-end relation. Note that goal and target express the same meaning in MFM theory.

objective threat


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