An appliance assembly activity is to be done by robots and the precedence diagra

Question

An appliance assembly activity is to be done by robots and the precedence diagram has nine steps as shown, with element times in minutes. and an output of 20 pts 3) 7 hrs /day. The assembly line operates continuously 512 units per day is desired. a) Compute the optimum cycle time, CT = b) What is the minimum number of robots? c) Group the activities into an appropriate number of work stations(ist your groups). How many stations are needed? d) What is the balance efficiency of your arrangement based on actual cycle times? 0.29 min. Dril Holes 0.42 min. Allign frame 0.74 min. Set speed 0.34 min ck up frame 0.49 min. Install switch 0.51 min. Package 0.30 min. 0.40 min. Electrical check Install Motor 0.40 min. Connect Motor

Explanation / Answer

1. current cycle time is- 5 min 19 seconds

(0.34+0.42+0.29+0.49+0.74+0.40+0.51)= 319 seconds

it is the longest duration in this path

if you prefers to shortest path, then = 0.34+0.30+0.40+ 0.74+0.40+ 0.51= 269 seconds

2. the minimum number of robots used are 7 robots

3. the total 7 works can be grouped under 5 heads of works

4. the balanced efficiency is- 5.19 minutes

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