Problem
Sandwich Health Shop prepares its standard sandwich according to the following process:
Step Activity Time
(Seconds) Pre Req step
• Customer places the order and pays for it to cashier 45 -
• Worker 1 cut the bread 20 1
• Worker 2 adds ingredients And places the sandwich into the toaster 40 2
• Toaster heats the sandwich (One sandwich at a time) 50 3
• Worker 3 takes out from the toaster, wraps and hands the sandwich to the customer 35 4
All the five steps should be carried out in sequence: 1, 2, 3, 4, 5
Task
A. Draw a flow diagram of all five steps, each step in a different block. Write the activity in each block and the time it takes under the block (as explained in class).
B. What is the bottleneck step?
C. What is the maximum number of sandwiches per hour that can be handled by the present configuration of the process?