The White Tooth Device Company is a manufacturer of high-end electric toothbrushes. For each toothbrush, there are a sequence of assembly steps performed by five workers. Each worker does two tasks. Workers are paid $15 per hour.
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labor content = sum of the time taken by all tasks = 215 sec
Hourly Output of different steps
worker A = 3600/ 65 =55.38
worker B = 3600 /35 =103
worker C =3600/ 25 =144
worker D = 3600 /30 =120
worker E =3600/60 =60
Process is constrained by the worker A which has the lowest output of 55.38 per hour
b. Direct labor cost = cost incurred / toothbrushes produced = 15x5 /55.38 = 1.354
c.Utilisation of person A = 1= 100%
d Utilisation of B = 55.38/103 =0.5376
Utilisation of C = 55.38/144 = 0.3845
Utilisation of D = 55.38 / 120 =0.4615
Utilisation of E = 55.38 /60 =0.923
average of these numbers ( A to E) = 0.6613
e.takt time = time available / units to be produced = 60/40 =1.5 min
f For takt time of 50, the hourly output should be 3600/50 =72
resources needed at different steps would be
T1+T2 =2
T3+T4 =1
T5+T6 =1
T7+T8 =1
T9+T10 =2
total = 7
g. Bottleneck A would be the right place for the new worker, which will double the capacity of this step. However, the new bottleneck will now be E which will have capacity of 60 per hr.
h. The step with 40 sec is the longest one. It can be combined with either step having time 25 sec ( as before) or 35 sec. The earlier arrangement is better. The capacity would remain the same.
i the highest time 40 needs to be combined with lowest number which is 10. It gives a task time of 50. It is not possible to find a highest combination which is less than 50. Hence the capacity
= 3600/50 = 72 per hour
The White Tooth Device Company is a manufacturer of high-end electric toothbrushes. For each toothbrush, there...
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