Given a shift of eight hours with 20 minutes breaks, process time 1 minute, setup 15 minutes, and an interval of 60 parts, what is the capacity?

Given a shift of eight hours with 20 minutes breaks, process time 1 minute, setup 15 minutes, and an interval of 60 parts, what is the capacity?

• A. 460
• B. 368
• C. 480
• D. 384

Answer: (B)

Capacity is how many parts can be produced in the available shift time, using the cycle time per part. Here the cycle time includes both processing and the setup for each batch. Since parts are produced in batches of 60, you incur a setup of 15 minutes for each batch, plus 60 parts processed at 1 minute each. So the time to produce one batch of 60 is 15 + 60 = 75 minutes, making the cycle time per part 75/60 = 1.25 minutes. The available production time is eight hours minus breaks: 8 hours = 480 minutes, minus 20 minutes breaks = 460 minutes. Therefore, capacity = 460 minutes / 1.25 minutes per part = 368 parts per shift.

Capacity is how many parts can be produced in the available shift time, using the cycle time per part. Here the cycle time includes both processing and the setup for each batch. Since parts are produced in batches of 60, you incur a setup of 15 minutes for each batch, plus 60 parts processed at 1 minute each. So the time to produce one batch of 60 is 15 + 60 = 75 minutes, making the cycle time per part 75/60 = 1.25 minutes.

The available production time is eight hours minus breaks: 8 hours = 480 minutes, minus 20 minutes breaks = 460 minutes.

Therefore, capacity = 460 minutes / 1.25 minutes per part = 368 parts per shift.