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Probability Distributions
Probability Distribution – Binomial, Poisson, Normal, and Exponential
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Facility Location and Layout
Site Selection and Analysis, Layout Design and Process
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Quality Management
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Unit VIII: Business Statistics and Operations Management

Motion Study is the systematic analysis of human motions used in performing a task. The goal is to eliminate unnecessary motions, simplify work, and increase efficiency.

It’s closely related to Time Study, but while Time Study focuses on how long a task takes, Motion Study focuses on how the task is done.


πŸ“Œ Why is Motion Study Important?

  1. Reduces Fatigue: By eliminating awkward or excessive motions.

  2. Improves Productivity: Helps design more efficient work methods.

  3. Enhances Safety: Identifies risky or harmful movements.

  4. Lowers Costs: More efficient motions lead to lower labor costs.


🧰 How is Motion Study Done?

  1. Select the Task: Choose a repetitive or critical task.

  2. Observe the Movements: Watch how the task is performed (can use video recordings).

  3. Break Into Basic Motions: Identify small body movements (e.g., reach, grasp, move, release).

  4. Analyze Each Motion: Check if the motion is necessary, if it can be simplified, or eliminated.

  5. Design Better Methods: Create a more efficient way of performing the task using fewer or better motions.

  6. Implement & Train: Apply the new method and train employees.


🧠 Example:

Imagine a worker in a packaging line:

  • Old method: Picks up a box, walks 2 steps, gets tape, then returns to seal it.

  • Motion Study reveals: The tape can be placed next to the box.

  • Result: Saves time, energy, and boosts speed.


🎯 Key Concept: Therbligs

Developed by Frank and Lillian Gilbreth, therbligs are 18 elemental motions (like reach, grasp, hold, position, release) used to analyze tasks scientifically.


βœ… Applications in Business

  • Manufacturing: Streamlining assembly lines.

  • Healthcare: Improving nurse/doctor movements for patient care.

  • Retail & Logistics: Optimizing warehouse operations.

  • Service Sector: Enhancing customer service processes.