Micromotion study in work measurement refers to which of the following?

Introduction / Context:
Micromotion study aims to refine manual methods by examining the tiniest building blocks of human motion. By analysing therbligs, engineers reduce unnecessary effort and improve ergonomics.

Given Data / Assumptions:

• Short-cycle, repetitive manual tasks.
• Use of motion picture/video (e.g., at high frame rates) and therblig symbols.
• Goal is to eliminate, combine, rearrange, and simplify motions.

Concept / Approach:
Therbligs (e.g., reach, grasp, transport loaded) allow precise classification of hand and body motions. Studying their sequence and duration reveals waste such as unnecessary reaches or awkward postures.

Step-by-Step Solution:

Verification / Alternative check:
Gilbreth’s motion study and modern ergonomics endorse therblig-based analysis for fine-grained improvement.

Why Other Options Are Wrong:
(a) and (b) are partial or mis-stated views; micromotion is specifically therblig-based.(d) Enlarged view alone is not analysis.(e) Work sampling is a different statistical technique.

Common Pitfalls:
Over-focusing on tiny motions without considering workstation layout; ignoring fatigue and safety.

Final Answer:

Subdividing an operation into therbligs (basic motions) and analysing them