The quality cost

What defect rate and variability cost downstream.

The part

What it is

A cheaper input with a higher defect rate costs the inspection, the rework and the delay it causes, all of which sit in other budgets.

Variability costs even where the average quality is acceptable, because the process has to absorb it.

The smallest level

The attributes it carries

Each attribute is one of the framework’s shared types. What a date is, and how it is written, is defined once for the whole model — the note here says what it means in this particular place.

Defect rate
How often the input fails specification.
Percentage shared type
Cost per defect
What a defect costs downstream, which is where the real difference sits.
Money shared type
Variability
How consistent the input is, which the process must absorb.
Measure shared type