Question

In work study, this technique involves making a film for permanently recording time and motion.

• A. Chrono-cycle graph
• B. Micro-motion study
• C. Cycle-graph
• D. Micro-cycle graph

Hint:

Micro-motion study is the most precise tool in motion study, as it allows researchers to break down complex, rapid movements into 17 fundamental hand motions called 'therbligs' (Gilbreth spelled backward).

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Work study and ergonomics aim to improve work efficiency and reduce fatigue by analyzing and simplifying body movements.
Various visual and graphic techniques are used to record and study time and motion.

Step 2: Detailed Explanation:
Let us review the work study techniques developed by Frank and Lillian Gilbreth:
1. Micro-motion study: This technique is used to analyze highly rapid, repetitive, or short-cycle manual tasks.
It involves filming the work activity using a motion picture camera alongside a highly precise timing device (such as a micro-chronometer).
The resulting film provides a permanent, frame-by-frame record of the worker's movements and the exact time elapsed for each element of the task (measured in therbligs).
This allows researchers to study the motion sequence in detail to eliminate unnecessary movements.
2. Cycle-graph: This involves attaching a small electric bulb to the worker's hand or finger and capturing the motion pathway as a continuous line of light on a long-exposure photograph.
3. Chrono-cycle graph: This is similar to a cycle-graph, but the light bulb is designed to flash at regular intervals. This produces a dashed line of light on the photograph, allowing researchers to calculate speed and direction.

Step 3: Final Answer:
The technique that involves filming to permanently record time and motion is the Micro-motion study, corresponding to option (B).