Sheet Metal Stamping Simulation

“Measurement system analysis developed by the Shainin Consultants. The measurement system is compared to process variation. The goal is to have a discrimination ratio of 6 or greater for the process variation divided by the measurement system variation, where discrimination is equal to product variation divided by measurement variation. The formulas are as follows: The discrimination ratio = P/ M. M is measurement variation; P is the process variation; l is the measured length of the process variation along the axis of the best fit line. M and P can be derived using the following formulas: l 6 , l2 =m2 = 2 p2 , p= ( l 2/2m2/2). A short cut is to measure M and l directly from the Isoplot and use l/m8.5 (Shainin, D., Shainin, P. D., & Shainin, R. D., 1988-1993, p.37-77). “A given value or specific setting of a quantitative factor, or a specific option of a qualitative factor, that is included in the experiment. The levels of a factor selected for study in the experiment may be fixed at certain values of interest, or they may be chosen from many possible values.” (Moen, R. D., Nolan, T. W., Provost, L. P., 1991, p.404).

Source: The OHIO State University