9. Morris Machine Shop has four jobs waiting to be run on the milling machine, and three of them must then go to the drill press for the next operation before they are completed. There is an operator for each machine. Times for the two processes are shown below.

a. Sequence the jobs so that all will be completed in the minimum time.

b. How long will the milling machine be operated to do these jobs?

c. If the drill press operator and the milling machine operator can be scheduled to work at different times, how long after the milling machine operator begins should the drill press operator arrive?

d. How long will the drill press operator need to work to complete these jobs in 1 day?

Transcribed Image Text:

JOB MILLING TIME (HOURS) DRILLING TIME (HOURS) ABCD 2.4 2.10 2.5 1.5 2.1 0.00 1.7 2.2