Operations Management: Facility, Layout, and Productivity
Facility Location and Layout
Facility location and layout are critical strategic decisions in operations management. They directly impact a company’s ability to compete, its operating costs, and its long-term efficiency.
1. Facility Location
Importance
Choosing where to place a facility is a long-term commitment that is often difficult and expensive to reverse. It influences:
- Operating Costs: Logistics, labor, and utility costs vary by region.
- Customer Service: Proximity to markets affects delivery speed.
- Competitive Advantage: Strategic positioning can block competitors or tap into specialized labor pools.
Factors in Location Analysis
When evaluating potential sites, businesses look at two categories of factors:
A. Quantitative Factors (Measurable)
- Proximity to Markets: Essential for perishable goods or high-delivery-cost items.
- Proximity to Suppliers: Reduces transportation costs and lead times.
- Labor Costs: Wage rates and the availability of skilled workers.
- Utilities: Reliability and cost of power, water, and telecommunications.
B. Qualitative Factors (Subjective)
- Political Risk: Stability of the local or national government.
- Quality of Life: Education, healthcare, and recreation (important for attracting talent).
- Environmental Regulations: Local laws regarding waste and emissions.
Location Analysis Techniques
- Factor Rating Method: Assigns weights to various factors (e.g., labor, infrastructure) and scores each location. The location with the highest weighted score is chosen.
- Center of Gravity Method: A mathematical technique used to find a location that minimizes transportation costs between a central warehouse and multiple supply/distribution points. (Where d is the coordinate and W is the volume or weight being shipped).
- Locational Break-Even Analysis: Uses cost-volume-profit analysis to compare the fixed and variable costs of different sites.
2. Facility Layout
Facility layout refers to the physical arrangement of departments, workstations, and equipment within a facility.
Objectives
- Minimize Material Handling: Reducing the distance items travel.
- Efficiency: Optimizing the use of floor space and labor.
- Safety: Ensuring a secure environment for employees.
- Flexibility: Allowing the layout to adapt to changes in product design or volume.
Basic Types of Layouts
| Layout Type | Description | Best For… |
|---|---|---|
| Process Layout (Functional) | Groups similar machines/functions together (e.g., all drills in one area). | High-variety, low-volume production (e.g., hospitals, machine shops). |
| Product Layout (Line) | Arranges equipment according to the sequence of operations for a specific product. | Low-variety, high-volume production (e.g., car assembly lines). |
| Fixed-Position Layout | The product stays in one place while workers and equipment come to it. | Bulky or fragile projects (e.g., shipbuilding, aircraft assembly). |
| Cellular Layout (Group Tech) | Organizes dissimilar machines into “cells” to work on products with similar shapes or processing requirements. | Balancing the efficiency of a product layout with the flexibility of a process layout. |
Advantages of a Good Layout
- Reduced Bottlenecks: Smoother flow of work-in-progress.
- Lower Inventory: Less space needed for storage between stages.
- Higher Employee Morale: Better ergonomics and organized workspaces lead to higher satisfaction.
Production Planning and Control (PPC)
Production Planning and Control (PPC) is the “nervous system” of a manufacturing facility. It ensures that resources are organized efficiently to meet production targets on time and at the lowest possible cost.
Core Concepts
PPC involves two distinct phases:
- Planning: Looking ahead to determine what, how, when, and where work will be done.
- Control: Monitoring the execution of the plan and taking corrective action if there are deviations from the schedule.
Objectives
- Resource Optimization: Ensuring machines and labor are fully utilized without being overloaded.
- Inventory Management: Minimizing “Work-in-Progress” (WIP) and raw material costs.
- Timely Delivery: Ensuring products reach customers according to the promised schedule.
- Cost Reduction: Eliminating waste and redundant movements.
Steps in PPC
- Routing: Determining the path (sequence of operations) the raw material will follow.
- Loading: Assigning specific jobs to specific machines or work centers.
- Scheduling: Setting the start and finish times for every operation.
- Dispatching: The actual release of orders and instructions to the shop floor.
- Follow-up (Expediting): Checking for delays and removing bottlenecks.
Work Study and Productivity
Work Study is a systematic examination of human work to improve efficiency and set standards. It is the umbrella term for Method Study and Work Measurement.
Productivity
Productivity is the ratio of output to input. Work Study improves this ratio not by making people work harder, but by making them work smarter.
Method Study (Motion Study)
The goal is to find the “One Best Way” to perform a task by eliminating unnecessary movements.
- Process: Select the job → Record facts (using charts) → Examine critically → Develop the new method → Install → Maintain.
- Tools: Flow Process Charts, String Diagrams, and Therbligs (basic elemental motions).
Work Measurement (Time Study)
Once the best method is established, Work Measurement determines the Standard Time required for a qualified worker to complete the task at a defined level of performance.
Components of Standard Time
- Observed Time: The actual time recorded during the study.
- Rating Factor: Adjusting the observed time based on the worker’s pace (e.g., if they are working 10% faster than average).
- Allowances: Adding time for personal needs, fatigue, and unavoidable delays.