Using manufacturing$-$based criteria to measure

product quality, which of the following should

you monitor on a regular basis?

$($A$)$ Customers$$ subjective perceptions of the

reliability of the product when in use

$($B$)$ The conformance of the finished product

to agreed$-$to product specifications

$($C$)$ Objective, third$-$party tests of the

performance of the product

$($D$)$ Warranty repair histories of the finished

product