Search results for "Process evolution"

The Effect of Process Evolution on Capability Study

1996

In today manufacturing scenario the trend to produce with lower and lower tolerance and continuously decrease the defectives rate seems to be irreversible. Then the evaluation of system performances is essential to determine if the process is able to respect our tolerances. With the classical approach this evaluation is realised by considering the process in the in control state and evaluating the capability indices and, consequently, the defectives rate. In this paper the evolution of the process is considered in terms of the mean out-of-control-time, and the real defective rate is evaluated by proposing a new capability index.