This measure calculates the value of indirect materials and services—the items and activities not used to directly produce a product—as a percentage of total value of purchases. Indirect materials/services include machine maintenance services as well as office supplies. As part of a set of Supplemental Information measures, this measure helps companies evaluate additional variables not covered elsewhere for the "procure materials and services" process.
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(Value of all indirect materials and services purchased / Value of all materials and services purchased) * 100
Supplemental information is data that APQC determines is relevant to decision support for a specific process, but does not fit into the other measure categories such as cost effectiveness, cycle time, or staff productivity.