Noise-adaptive system modeling procedure based on the heuristic method stimulated by comparison

Validity in modeling systems depends on experiences of designers because validation processes have not been established. The authors propose a noise-adaptive system modeling procedure using a concept of Design Review Based on Failure Mode (DRBFM) as the validation process. The proposed procedure involves,1 Detecting a difference by comparison between a design condition in an ideal model with that in practical one, 2 Setting Noise N_i caused by the difference, 3 Predicting an effect by the noise ε_i, 4 Inserting an additional element m(ε_i) in the model and 5 Checking whether other ε_i, might exist. An experiment of modeling a robust model of a drain tube by university students using the proposed procedure or a normal process (FMEA) was conducted. Mean score of robustness of drains in a group using the proposed procedure was higher than that in the group using FMEA, which demonstrates the effectiveness of the proposed procedure.