The work-study engineer carries out the work sampling study for 120 hours. The following observations were made for a machine shop: Total number of observations 7000 No. of Idle activities 1200 Ratio between manual to machine elements 3 : 1 Average rating factor 120% Total number of jobs produced during study 800 units Rest and personal allowances 17% Compute the standard time for the job.

The work-study engineer carries out the work sampling study for 120 hours. The following observations were made for a machine shop: Total number of observations 7000 No. of Idle activities 1200 Ratio between manual to machine elements 3 : 1 Average rating factor 120% Total number of jobs produced during study 800 units Rest and personal allowances 17% Compute the standard time for the job.

Precision Machining Technology (MindTap Course List)

2nd Edition

ISBN:9781285444543

Author:Peter J. Hoffman, Eric S. Hopewell, Brian Janes

Publisher:Peter J. Hoffman, Eric S. Hopewell, Brian Janes

Chapter2: Measurement, Materials, And Safety

Section2.5: Quality Assurance, Process Planning, And Quality Control

Problem 10RQ: If an X-bar chart graph falls below the LCL or rises above the UCL, a machining process is said to...

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