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Amazon.com Area Manager Interview Question

I interviewed in Hazleton, PA and was asked:
"Math Problem: You have an upstream Picking department that feeds two downstream packing departments: A and B. 75% of your Pick volume goes to department A, which has a packing rate of 150 unites per labor hour (uph). 25% of the Pick volume goes to department B, which is for large items, and has a pack rate of 25 units per labor hour. Your pickers pick both large and small items throughout the day at an overall average rate of 100 units per labor hour. You have 25 people today for all 3 departments, and you absolutely must pack 7,500 units in department A to meet a customer promise metric. How do you allocate labor to balance the flow in your department if you work a 10 hour shift? Do not assume breaks or lunches in your answer. Department % of volume Rate (uph) People Daily Volume Pick 100% 100 ?? ?? Pack A 75% 150 ?? 7,500 Pack B 25% 25 ?? ??"
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7
of 16
votes
Department % of volume Rate (uph) People Daily Volume
Pick 100% 100 10 10,000
Pack A 75% 150 5 7,500
Pack B 25% 25 10 2,500
- Interview Candidate on Apr 15, 2010
1
of 1
vote
Stream Vol % Units/Hr Total Volume Hrs Reqd Staff Reqd
Pick 100% 100 10000 100 10
Pack A 75% 150 7500 50 5
Pack B 25% 25 2500 100 10
- Anand on Apr 22, 2013

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