I rate this tool a 2/5, along with DPU and DPMO. The reason is that I like to keep things simple, and metrics like this tend to lose audiences during project reviews. People ask, “What does that calculation really mean?” I prefer readily-understandable metrics like cost, PPM defect rate, and yield percentage. Customers do not care about DPU, DPO, and DPMO.

These metrics were popular when Six Sigma was developed, but I haven’t seen them used much since that time.

The training slide below shows how to calculate DPO, which stands for Defects Per Opportunity (see example to the right as well).

Defects Per Opportunity Calculation

Here is a DPO metric example for an order processing center –

DPO Example Page 1

DPO Example Page 2

DPO calculation example - page 3