Answer:
His firm's DPMO is 12,083
Step-by-step explanation:
The computation of the DPMO is shown below:
= (Total complaints ÷ total number of defects opportunity) × 1 million
where,
Total complaints = Shrinkage complaints + poor quality complaints + wear off complaints + fitting issue complaints
= 22 + 16 + 12 + 8
= 58 customers defects
And, the total number of defects opportunity would be equal to
= Number of t-shirts sold × number of possible complaints
= 1,200 × 4
= 4,800
Now put these values to the above formula
So, the value would be equal to
= (58 ÷ 4,800) × 1,000,000
= 12,083