Sequence of Work Study Experiments
Work study involves two main techniques: method study and time study. The goal is to standardize a process for both the best method and the appropriate time required.
Purpose of Work Study
The primary objective is process improvement and standardization. This involves finding the most efficient way to perform a task and then determining the standard time needed for its completion.
Role of Method Study
Method study focuses on improving the way a job is performed. It involves:
- Observing the current method.
- Analyzing the steps involved.
- Eliminating unnecessary elements.
- Developing a new, improved method.
- Standardizing the improved method.
This step ensures the task is done efficiently before its duration is measured.
Role of Time Study
Time study measures the time required to complete a specific task using a standardized method. It involves:
- Timing the elements of the job performed using the standardized method.
- Calculating the standard time based on these observations.
- Setting performance standards.
Time study is only meaningful once the method itself has been optimized and standardized.
Determining the Correct Sequence
To effectively standardize a process for both method and time, the sequence must be logical:
- Method Study First: Identify and standardize the most efficient and effective method for performing the task. This eliminates inefficiencies and variations in how the task is done.
- Time Study Second: Once the method is fixed and optimized, measure the time required to perform the task using that specific, standardized method. This allows for accurate time standardization.
Therefore, method study must precede time study for effective process standardization.
Important Questions from Line Balancing and Work Study
If (R) is the base rate guaranteed per hour, (S) is the standard time for the job and (T) is the actual time, then according to Rowan plan, wages for the job will be-
Fifty observations of production operation revealed a mean cycle time of 10 min. The worker was evaluated to be performing at 90% efficiency. Assuming the allowances to be 10% of the normal time, the standard time (in minutes) for the job is
- Fifty observations of production operation revealed a mean cycle time of 10 min. The worker was evaluated to be performing at 90% efficiency. Assuming the allowances to be 10% of the normal time, the standard time (in minutes) for the job is
A technique of Work measurement in which times established for basic human motions are used to build up the time for a job at the defined level of performance is called:
The time study of machinery operation recorded a cycle time of 7.0, 6.0, 7.0, 8.0 minutes. The performance rating of worker is 95%. The allowance fraction is 0.1. Standard time will be given by:
