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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 20​% allowance for workers. ​(Round all intermediate calculations to two decimal places before proceeding with further​ calculations.)                                                                                                                                                                    Performance Observation​ (seconds) Element Rating 1   2   3   4   5   Grasp and place bag 105 ​% 8   10   9   12   6   Fill bag 85 ​% 36   40   39   36   114 ​* Seal bag 105 ​% 14   17   13   19   17   Place bag on conveyor 85 ​% 7   6   9   30 ​^ 34 ​^   ​* Bag breaks​ open; included as delay in the allowance factor ​^ Conveyor​ jams; included as delay in the allowance factor Part 2 ​a) The standard time for this process​ = 80.71 seconds ​(round your response to two decimal​ places). Part 3 ​b) The number of observations that are required for a 90​% confidence level within 5​% accuracy​ = enter your response here observations ​(round your response up to the next whole​ number).

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 20​% allowance for workers. ​(Round all intermediate calculations to two decimal places before proceeding with further​ calculations.)                                                                                                                                                                    Performance Observation​ (seconds) Element Rating 1   2   3   4   5   Grasp and place bag 105 ​% 8   10   9   12   6   Fill bag 85 ​% 36   40   39   36   114 ​* Seal bag 105 ​% 14   17   13   19   17   Place bag on conveyor 85 ​% 7   6   9   30 ​^ 34 ​^   ​* Bag breaks​ open; included as delay in the allowance factor ​^ Conveyor​ jams; included as delay in the allowance factor Part 2 ​a) The standard time for this process​ = 80.71 seconds ​(round your response to two decimal​ places). Part 3 ​b) The number of observations that are required for a 90​% confidence level within 5​% accuracy​ = enter your response here observations ​(round your response up to the next whole​ number).

Practical Management Science
Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter2: Introduction To Spreadsheet Modeling
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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
20​%
allowance for workers. ​(Round all intermediate calculations to two decimal places before proceeding with further​ calculations.)
                                                                                                                                                                
 
Performance
Observation​ (seconds)
Element
Rating
1
 
2
 
3
 
4
 
5
 
Grasp and place bag
105
​%
8
 
10
 
9
 
12
 
6
 
Fill bag
85
​%
36
 
40
 
39
 
36
 
114
​*
Seal bag
105
​%
14
 
17
 
13
 
19
 
17
 
Place bag on conveyor
85
​%
7
 
6
 
9
 
30
​^
34
​^
 
​* Bag breaks​ open; included as delay in the allowance factor
​^ Conveyor​ jams; included as delay in the allowance factor
Part 2
​a) The standard time for this process​ =
80.71
seconds ​(round your response to two decimal​ places).
Part 3
​b) The number of observations that are required for a
90​%
confidence level within
5​%
accuracy​ =
enter your response here
observations ​(round your response up to the next whole​ number).
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