1. An external supplier suggests shipping the battery module with preinstalled b
ID: 384847 • Letter: 1
Question
1. An external supplier suggests shipping the battery module with preinstalled batteries, thereby eliminating the need for step 10. How would that impact process capacity?
2. If an external supplier suggests shipping the battery module with preinstalled batteries, thereby eliminating the need for step 10, What is process capacity in clock per hour?
The manufacturing of a clock is comprised of six steps. Each step is staffed by one worker. The table shows the tasks performed by each worker and the corresponding processing time: Step Tasks Processing Time seconds) 1. Heat-stake lens to bezel 2. Inspect bezel 3. Clean switch holes 4. Install set switch in bezel Total time for A 14 26 10 18 68 Preparation 5. Check switch travel 6. Clean inside bezel 7. Install module in bezel Total time for B 23 12 25 60 Preparation 2 8. Install battery clip on module 9. Heat-stake battery clip on module 10. Install two batteries in module 11. Check switch Total time for C 20 20 Battery Installation 8 70 2. Install band 13. Inspect band Total time for D 45 13 58 Band Installation 14. Cosmetic inspection 15. Final test Total time for E 61 65 Packaging Preparation 16. Place watch and cuff in display box 20 17. Place cover in display box base 18. Place owners manual and box into30 Watch packaging 14 64 Total time for FExplanation / Answer
1) currently total time of C is the maximum. Therefore t is the bottleneck. Process cycle time = 70 secods
with step 10 eliminated, total time for C = 20+20+8= 48 seconds
Now task C s no longer the bottleneck. Now step A is bottleneck with cycle time of 68 seconds
Cycle time has reduced, therefore process capacity has increased.
2) new process capacity = (1/cycle time in seconds)*3600 seconds per hour
= (1/68)*3600
= 52.94 clocks per hour
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