The Konishi Electronics Company manufactures computermicrochips. A particular job that has been under analysis aspart of a quality-improvement program was the subject of atime study. The time study encompassed 20 job cycles, andthe results include the following cumulative times and per-formance rating factors for each element:a. Compute the standard time for this job using an al-lowance factor of 15%.b. Using a sample standard deviation of 0.51 minutes, de-termine the number of cycles for this time study suchthat the company would be 95% confident that the av-erage time from the time study is within 5% of the trueaverage cycle time. Time-Study Observation SheetIdentification of operationStein assemblyDate7/15OperatorSmithApprovalObserverJonesRussellCyclesSummary379.10ElRFNtPlace mug in viselholder upside downR0.12 2.05 4.04 5.92 7.86 9.80 11.73 13.65 15.64 17.591.05Press both bracketsides around2handleR0.19 2.12 4.09 6.01 7.94 9.88 11.81 13.72 15.7 17.661.00Solder bracket seamon inside of handleR 1.05 3.01| 4.91 6.87 8.81 10.71 12.66 14.56 16.52 18.501.10Turn stein right side4upR 1.13 3.08 4.98 6.93 8.90 10.79 12.74 14.66 16.63 18.591.10Solder lid top to5bracketR 1.75 3.76 5.65 7.60|9.56 11.45 13.36 15.34 17.31 19.281.05Remove stein from6 holder and place in boxR 1.913.90 5.79 7.75 9.70 11.61 13.53 15.49 17.46 19.441.00co6.

Identification of operation Stein assembly Operator Approval Cycle 1…

Answered: Time-Study Observation Sheet…

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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Question

The Konishi Electronics Company manufactures computer
microchips. A particular job that has been under analysis as
part of a quality-improvement program was the subject of a
time study. The time study encompassed 20 job cycles, and

the results include the following cumulative times and per-
formance rating factors for each element:

a. Compute the standard time for this job using an al-
lowance factor of 15%.

b. Using a sample standard deviation of 0.51 minutes, de-
termine the number of cycles for this time study such

that the company would be 95% confident that the av-
erage time from the time study is within 5% of the true

average cycle time.

Time-Study Observation Sheet
Identification of operation
Stein assembly
Date
7/15
Operator
Smith
Approval
Observer
Jones
Russell
Cycles
Summary
3
7
9.
10
El
RF
Nt
Place mug in visel
holder upside down
R0.12 2.05 4.04 5.92 7.86 9.80 11.73 13.65 15.64 17.59
1.05
Press both bracket
sides around
2
handle
R0.19 2.12 4.09 6.01 7.94 9.88 11.81 13.72 15.7 17.66
1.00
Solder bracket seam
on inside of handle
R 1.05 3.01| 4.91 6.87 8.81 10.71 12.66 14.56 16.52 18.50
1.10
Turn stein right side
4
up
R 1.13 3.08 4.98 6.93 8.90 10.79 12.74 14.66 16.63 18.59
1.10
Solder lid top to
5
bracket
R 1.75 3.76 5.65 7.60|9.56 11.45 13.36 15.34 17.31 19.28
1.05
Remove stein from
6 holder and place in box
R 1.91
3.90 5.79 7.75 9.70 11.61 13.53 15.49 17.46 19.44
1.00
co
6.

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