PQ Systems - Quality eLine
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Multiple control limits:
A long shot, or just a
bad slice?

Quality Quiz: With a video!

Data in everyday life

Bytes and pieces

FYI: Current releases

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Quality Gamebox


Quality Quiz:Professor Cleary
Another quiz from Professor Cleary

Quality manager Justin Kase has been assigned to record and analyze the exact sizes of windshield wiper blades that are manufactured by E-Z-C Squeegee Company. Knowing that the task requires the use of an operational definition, he identifies the correct measurement for the blades that the company releases, and uses an approved caliper to take the measurements. Specifications require that the target for length is 8 inches, plus and minus .1 inches.

All of the blades that Justin measured on Thursday met the standards, with measurements falling within the specifications. The following Tuesday, however, he measured a second batch of blades, and found that the measurements were centered on the target, but a number of the blades were close to the other specifications. “Oh well,” Justin sighed. “At least the measurements are accurate, and they fall within the spec limits.”

Does Justin understand the implications of these measurement patterns?

a) Yes.

b) No.


>> Watch a more complete video explanation

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