An example of a Quality control issue could be a broken zip on your favorite pair of Levis!!
THAT WOULD REALLY BE THE END!?
Howether to detrmine the quality of the zipper there is a procedure to asses and analyse how this fault can be avoided...
-Measuring the zipper dimension
-Topandbottom stops should be secured
-The zip should slide freely enough so that is still secuerd
-Durabilityof tthe zipper chain so itcan be dry cleaned
-Color of zippers match.