You performed a time study on four workers in a zone picking operation and found that they had the following pick rates:

Worker | Zone Pick Rate

1 | 160

2 | 175

3 | 150

4 | 190

a. If these four workers are in a sequential zone-picking system, what is the expected output of the system in lines picked per hour, assuming 100% efficiency?

b. If these four workers are used in a bucket brigade picking system, in what order would you align them for optimal output (from the start of the line to the end)? c. What is the optimal partition in such a bucket brigade picking system?