Calculate the defects per million opportunities (DPMO) given the following: Blak

Question

Calculate the defects per million opportunities (DPMO) given the following: Blake, owner of Blakester's T-shirt Shoppe, keeps track of customer complaints. For each T-shirt sold, there are four possible complaints: T-shirt shrinks, poor quality, design wears off, and doesn't fit right. Each week, Blake calculates the rate of T-shirt "defects" per total T-shirts sold, and then uses this information to determine his company's DPMO. During the past week, his company sold 1200 T-shirts. His company received 22 customer shrinkage complaints, 16 poor quality complaints, 12 design wears off complaints, 8 doesn't fit right complaints. Calculate his firm's DPMO. 69,600 0.193 5.8 x 10 6 12,083

Explanation / Answer

1. DPMO:

Total Number of Defects found in the sample of 1200 = 22 +16 +12 + 8

=58

Total Number of Defect Oppurtunities = Sample size X defects Per unit in Sample

= 1200 X 4

= 4800

DPMO = Total Number of Defects found in the sample / Total number of defect Oppurtunities X 1,000,000

= 58/4800 X 1,000,000

= 120,83

2. Out of Control.

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