The normal time for the overall process ____? minutes (round your response to two decimat places)The standard time for this process ____? minutes (round your response to two decimal places)The number of observations that are required for a 99% confidence level within 5 % accuracy ____? observations (round your response to the immediate higher whole number) Installing mufflers at the O'Sullivan Garage in Golden, Colorado, involves five work elements. Jill O'Sullivan has timed workers performing these tasks seven times, withthe results shown in the following table.PerformanceObservation (minutes)ElementRating34567Select correct muffler105 %6415*4Remove old muffler85%877Weld/install new muffler105 %14151411141712Check/inspect workComplete paperwork95%2425*44217*135 %679767*Employee has lengthy conversations with boss (not job related).By agreement with her workers, Jill allows a 12% fatigue factor and a 12% personal-time factor. To compute the standard time for the work operation, Jill excludes allobservations that appear to be unusual or nonrecurring. She does not want an error more than 5%. (Round all intermediate calculations to two decimal places beforeproceeding with further calculations.)

Here, in the question, the table data includes performance rating data, observations in minutes,…

Answered: The normal time for the overall process…

Practical Management Science

6th Edition

ISBN:9781337406659

Author:WINSTON, Wayne L.

Publisher:WINSTON, Wayne L.

Chapter2: Introduction To Spreadsheet Modeling

Section: Chapter Questions

Problem 20P: Julie James is opening a lemonade stand. She believes the fixed cost per week of running the stand...

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The normal time for the overall process ____? minutes (round your response to two decimat places)

The standard time for this process ____? minutes (round your response to two decimal places)

The number of observations that are required for a 99% confidence level within 5 % accuracy ____? observations (round your response to the immediate higher whole number)

Installing mufflers at the O'Sullivan Garage in Golden, Colorado, involves five work elements. Jill O'Sullivan has timed workers performing these tasks seven times, with
the results shown in the following table.
Performance
Observation (minutes)
Element
Rating
3
4
5
6
7
Select correct muffler
105 %
6
4
15*
4
Remove old muffler
85%
8
7
7
Weld/install new muffler
105 %
14
15
14
11
14
17
12
Check/inspect work
Complete paperwork
95%
2
4
25*
4
4
2
17*
135 %
6
7
9
7
6
7
*Employee has lengthy conversations with boss (not job related).
By agreement with her workers, Jill allows a 12% fatigue factor and a 12% personal-time factor. To compute the standard time for the work operation, Jill excludes all
observations that appear to be unusual or nonrecurring. She does not want an error more than 5%. (Round all intermediate calculations to two decimal places before
proceeding with further calculations.)

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