The Dubuque Cement Company packs 80-pound bags of concrete mix. Time-study data for the filling
activity are shown in the following table. Because of the high physical demands of the job, the
company's policy is a
25%
allowance for workers. (Round all intermediate calculations to two decimal places before procering
with further calculations.)
%
Performance Observation (seconds)
Element
Rating
2145
Grasp and place bag 115
%
10 8117
Fill bag
85
%
36 40 40 B41104
Seal bag
110
15 17 14 2017
Place bag on conveyor85
915 831 436
31 A36A
* Bag breaks open; included as delay in the allowance factor
^ Conveyor jams; included as delay in the allowance factor
a) The standard time for this process =
nothing
seconds (round your response to two decimal places).
b) How many observations are necessary for 99% confidence, within 5% accuracy?
Answers
Answer:
The Dubuque Cement Company packs 80-pound bags of concrete mix. Time-study data for the filling activity are shown in the following table. Because of the high physical demands of the job, the company%u2019s policy is a 23% allowance for workers.
a) Compute the standard time for the bag-packing task.
b) How many observations are necessary for 99% confidence,
within 5% accuracy?
Element Observations (seconds) Performance Rating (%)
1 2 3 4 5
Grasp and place bag 8 9 8 11 7 110
Fill bag 36 41 39 35 112a 85
Seal bag 15 17 13 20 18 105
Place bag on conveyor 8 6 9 30b 35b 90
aBag breaks open; included as delay in the allowance factor.
bConveyor jams; included as delay in the allowance factor.