An abnormality detection step developing device (10) is provided with: a parameter setting unit (14) that sets parameter verification ranges with respect to parameters relating to abnormality determination included in a mechanical device abnormality detection step; an evaluation unit (15), which changes parameters values within the parameter verification ranges, and evaluates, with respect to the parameter values thus changed, abnormality detection performances of the abnormality detection step; and a display unit (19) that displays a performance evaluation table, i.e., a list of the abnormality detection performances evaluated by means of the evaluation unit (15) with respect to the parameter values.
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