A threestep process is used to make a product The yield of s

A three-step process is used to make a product. The yield of:
step 1 is 80%;
step 2 is 40%;
step 3 is 75%.

Step 1 takes 2 minutes per unit.
Step 2 takes 4 minutes per unit.
Step 3 takes 5 minutes.

How many good units can the process produce per hour?

Solution

A three-step process

Yield for each of the steps is 0.8, 0.4, and, 0.75.

The three steps take 2,4, and, 5 minutes per unit respectively.

The number of good units that can be process produced per hour =

Step 3 can process 12 per minute.

Efficiency =0.75

Number of units = 9