QUESTION: Prepare a flow process chart of this operation. ( Draw a simple process flow chart for the process which is given below using rectangles for input & output and Diamond box for decision etc.)

There are two identical drill presses in the shop, which drill the raw stock per the order specifications. There is only one queue for the two drills. Drilling time for a part (unit) is best approximated by a uniform distribution with a low and high of 2 and 3 minutes, respectively. Upon completion of drilling, the part is sent to one of the two buffing machines (new and old) with the ratio of 3 to 1. There is a separate queue for each buffing machine. The new automated buffing machine is faster and safer with constant buffing time of 30 seconds. The second manual buffing machine is old and tired with buffing time that is Triangular distributed with the minimum 1 minute, mode 1.25 minutes, and maximum 1.50 minutes.

The buffed parts are sent to the packaging section where they are made into packages of 5 and stacked for order fulfillment per the original order forms.