A job-design to be time-studied has fatigue and delay allowance o
A. 1.143
B. 0.8
C. 12.0
D. None of these
Please scroll down to see the correct answer and solution guide.
Right Answer is: A
SOLUTION
Concept:
Allowance:
The allowance is the amount of time allowed for personal, fatigue, and unavoidable delays.
Total allowance = Personal allowance + Basic fatigue allowance + Other unavoidable delay allowance
Standard Time = Normal Time + Allowance Time
Standard Time = Normal time x Allowance factor
\(Allowance~ factor = \frac {Standard ~time}{Normal ~time}\)
Calculation:
Given:
Personal allowance = 25 minutes, Fatigue allowance = 10 minutes, Unavoidable delay allowance = 25 minutes, Standard time = 8 hour (shift)
Total allowance = Personal allowance + Fatigue allowance + Unavoidable delay allowance
Total allowance = 25 + 10 + 25 = 60 minutes = 1 hour
Standard Time = Normal Time + Total Allowance
∴ Normal time = Standard time - Total allowance = 8 - 1 = 7 hour
\(Allowance~ factor = \frac {Standard ~time}{Normal ~time}\)
\(Allowance~ factor = \frac 87 = 1.1428 = 1.143\)
Time study:
- The classical approach to time study was developed by W. Taylor in 1911 and it is an accepted procedure for production analysis.
- It is an analysis of a worker’s performance against a time standard.
- Time studies are normally performed on short repetitive production types of tasks.
Terms related to Time study:
Cycle Time:
It is the total time required for a worker to complete one cycle of operation.
Machine Cycle time:
It is the total time for a machine to finish one complete cycle. It includes loading and unloading.
Normal Time:
The normal time for a particular employee is rated against the average job element-time. It is given by:
\(Normal\;Time = \frac{{Average\;element\;\times\;Performance\;rating}}{{100}}\)
Allowance Time:
- It includes personal factors as well as unavoidable constraints encountered in the work situation.
- It includes all unavoidable delays but rules out all avoidable delays.
Standard Time:
It is the time needed to complete an operation by an employee working at 100 % efficiency with unavoidable delays.
It is given by:
Standard Time = Normal Time + Allowance Time
Normal time = Observed time x Rating factor
