Homework $-$ Tailgate Panel Appearance

Defects known as 'streaks' were produced during the sanding operation on aluminum tailgate panels. An experiment was designed to eliminate these streaks, which would reduce a $5\%$ scrap and rework rate.

A brainstorming session initially identified $17$ factors. These were refined to $7$ factors at $2$ levels each.

$y=$ 'streaks' $($good$,$ normal, bad$)$

Parts graded as good or normal were acceptable to customers.

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