L_Work_Measurement

L_Work_Measurement - Reading Pages Work Measurement 348 353...

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BIT 3414 Copyright 2011 p. 1 Work Measurement Used to estimate standard time required to perform a task or proportion of time spent on a task Where: Standard Time is the time required by an average worker to perform a job once Methods of performing work measurement: Stopwatch time study Predetermined motion times Work sampling Stopwatch Time Study -- Basic Steps 1. Establish the standard job method 2. Break down the job into elements 3. Study the job 4. Rate the worker’s performance (RF) average worker RF = 1.0 slower worker RF < 1.0 faster worker RF > 1.0 5. Compute the average elemental time ( t ) 6. Compute the normal time Normal Time = (average elemental time) (rating factor) Nt = ( t )(RF) Normal Cycle Time = NT = Σ Nt 7. Compute the standard time Standard Time = (normal cycle time) (1 + allowance factor) ST = (NT) (1 + AF) Reading Pages 348 – 353 Bottom 354 – 357
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BIT 3414 Copyright 2011 p. 2 Stopwatch Time Study Example A grocery chain sells prewrapped flowers in its stores. The flowers are selected and wrapped in a central facility and then distributed to the stores in the area. A time study of the operation for assembling and wrapping a bouquet has been conducted, with the following results: Cycle Time (min) Performance Element 1 2 3 4 5 6 Rating Factor 1. Prepare wrapping 0.05 0.61 1.26 2.00 2.61 3.23 1.10 2. Select flowers 0.22 0.75 1.47 2.18 2.72 3.48 0.95 3. Arrange flowers 0.43 1.03 1.81 2.43 3.01 3.81 1.05 4. Place in box
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This note was uploaded on 11/21/2011 for the course BIT 3134 taught by Professor Clark during the Fall '11 term at Virginia Tech.

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L_Work_Measurement - Reading Pages Work Measurement 348 353...

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