The concept of Work Study techniques includes which of the following?

All of the above

The concept of work study includes time study, motion study, fatigue study and method study.

* The objective of method study is to find out one best way of doing the job. There are various methods of doing the job. To determine the best way there are several parameters
* Motion study refers to the study of movements like lifting, putting objects, sitting and changing positions, etc., which are undertaken while doing a typical job. Unnecessary movements are sought to be eliminated so that it takes less time to complete the job efficiently. 
* TIME STUDY determines the standard time taken to perform a well-defined job. Time measuring devices are used for each element of task. The standard time is fixed for the whole of the task by taking several readings. The method of time study will depend upon volume and frequency of the task, the cycle time of the operation and time measurement costs. The objective of time study is to determine the number of workers to be employed; frame suitable incentive schemes and determine labour costs.
*Fatigue study seeks to determine the amount and frequency of rest intervals in completing a task.