Correct Answer - Option 1 : ST =
\(\frac{NT }{(1-LL)}\)
Explanation:
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.
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
Standard Time = \(\frac{{Normal\;time}}{{1\; - \;allowance\;fraction}}\)
i.e. ST = \(\frac{NT }{(1-LL)}\)
∴ option (1) is the correct answer.
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.
