Step 1: Recall what Motion Study is.
Motion Study, developed by Taylor, involves the careful observation and analysis of bodily movements (such as lifting, placing objects, sitting, and changing positions) made by a worker while performing a job. The goal is to eliminate unnecessary and wasteful motions so the job can be done faster and more efficiently.
Step 2: Check Option (A).
Option (A) says unnecessary movements are eliminated so the job takes less time. This is exactly the purpose of Motion Study. Option (A) is correct.
Step 3: Check Option (B).
Option (B) describes motion study as the study of movements like lifting and putting objects while doing a typical job. This is the textbook definition. Option (B) is correct.
Step 4: Check Option (C).
Option (C) says through this technique, Taylor was able to design suitable equipment and tools. Motion study did help identify the best tools and equipment for efficient movement. Option (C) is correct.
Step 5: Understand what Time Study involves.
Time Study uses a stopwatch to determine the standard time needed to perform a specific task. Its outcomes include determining the number of workers required, framing suitable incentive wage schemes, and calculating labour costs.
Step 6: Check Option (D) and confirm the incorrect statement.
Option (D) says the technique helps determine the number of workers to employ, frame incentive schemes, and determine labour costs. These are the outcomes of Time Study, not Motion Study. Option (D) is the incorrect statement about Motion Study.
\[ \boxed{ \text{(D) This technique helps to determine the number of workers to be employed, frame suitable incentive schemes and determine labour costs.} } \]