The Supply Chain Operations Reference or SCOR model is a useful tool that allows rapid performance evaluations to be undertaken both internally or externally regarding specific focal firms. It includes five categories of performance factors. There are five parts to this question, each one dealing with a separate measurement from each SCOR category.

Part $($a$)(0\mathrm{.}5$ mark$)$: Under the category of Reliability, define what is meant by the $$order fill rate$$ measurement, how it would be calculated, how it would be interpreted for improving business performance, and provide a brief example?