Fill Rate

Fill Rate （充足率）

The fill rate is both a stopping rule and an output variable, defined as the fraction of site demands met when placed: that is, the probability that a part will be in stock at the place and time demanded. A fill rate of 98 per cent means that two per cent of the time the part will not be in stock upon request. It can be used as an alternative to the availability rate as a target, or stopping rule, in a run of the model. It is generally preferred as a measure of merit by supply personnel who treat every demand as of equal significance. The alternative measure, availability rate, translates the probability of a stock out into an expected waiting time for parts which is then added to the repair time in the calculation of availability.

The use of the Fill Rate stopping rule can be toggled on and off (Run/Stopping). When the toggle is on, the model's objective is to find the optimal stock levels given the specified fill rate. The fill rate is computed on every run, whether it has been chosen as a target or not.

If you have difficulty achieving the desired fill rate, check to see that you have not limited your stock by setting maximum stock values in Parts at Site. 

« Back to Glossary Index