Donner Case
Question 1:
What is the normal process flow of the production system at Donner? Draw a process flow diagram.
Question 2:
What orders would you schedule on the CNC drill? On CNC router?
Operation Setup Time (min) Run Time/board
Manual Drill 15 0.08*500 = 40
CNC Drill 240 0.004*500 = 2
Punch Press 50 1
CNC Router 150 0.5
a) CNC Drill vs Manual Drill
Let x be order size than
15 + 40x = 240 + 2x; x = 5.92;
From this equation we get x approximately equal to 6. So Donner Company should use the CNC Drill for orders of more than or equal to 6 boards. The Manual Drill process should be used for all orders of less than 6 boards. This is because production time for CNC is less than manual for order size of more than 6 units.
b) Punch Press vs CNC Router
As for above, let x be order size than
50 + x = 150 + 0.5x; x = 200;
So if order size is more than 200, Donor Company should go for CNC Drill. If order size is less than 200, Punch press......
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