Process Selection & Facility Layout: Types, Trade-offs & Design

Key Concepts and Process Selection

1. What is Process Selection?

Process selection is the decision-making activity that determines how a product or service will be produced. It involves choosing the right production process based on:

• Volume of output (low/high)
• Variety of products (customized/standardized)
• Cost constraints
• Lead time requirements

Types of Production Processes

Comparison of Production Processes

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2. How to Choose the Right Process?

The choice depends on three key factors:

1. Volume of Production
   • Low volume → Job Shop (e.g., custom furniture)
   • High volume → Mass/Continuous (e.g., soft drinks)
2. Product Variety
   • High variety → Job Shop/Batch
   • Low variety → Mass/Continuous
3. Cost and Efficiency
   • High setup cost → Mass/Continuous (economies of scale)
   • Low setup cost → Job Shop/Batch

Worked Example: Daraz’s Order Fulfillment Process

Daraz, Nepal’s largest e-commerce platform, uses a hybrid process:

• Batch Processing for bulk orders (e.g., 100+ units of the same product).
• Mass Production for standardized items (e.g., mobile phones, electronics).
• Job Shop for custom orders (e.g., personalized gifts).

Why?

• Efficiency: Batch processing reduces handling costs.
• Flexibility: Job shop handles unique customer requests.
• Scalability: Mass production meets high demand for popular items.

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Facility Layout: Designing the Workspace

1. What is Facility Layout?

Facility layout refers to the physical arrangement of machines, equipment, and workstations to optimize:

• Material flow (minimize movement)
• Space utilization (reduce waste)
• Worker efficiency (ergonomics)
• Cost reduction (lower transportation costs)

2. Types of Facility Layouts

Comparison of Facility Layouts

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3. How to Design an Efficient Layout?

Step-by-Step Approach

1. Analyze Product/Service Requirements
   • What is the volume? (Low/High)
   • What is the variety? (Customized/Standardized)
2. Determine Material Flow
   • Use flowcharts to map movement between departments.
   • Minimize crossing paths (inefficient movement).
3. Group Similar Activities
   • Product Layout: Arrange in sequence (e.g., assembly line).
   • Process Layout: Group by function (e.g., machining, painting).
4. Optimize Space
   • Use squared footage efficiently.
   • Avoid bottlenecks (e.g., a single machine slowing down production).
5. Consider Ergonomics & Safety
   • Worker comfort → higher productivity.
   • Safety compliance → reduces accidents.

Worked Example: Nabil Bank’s ATM Processing Center

Nabil Bank’s ATM card production follows a product layout:

1. Card Printing → Encoding → Quality Check → Packaging
2. Why?
   • High volume of cards → linear flow reduces errors.
   • Standardized process → low training cost for workers.
3. Efficiency Gain:
   • Reduced processing time by 30%.
   • Lowered defect rate to <0.5%.

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In the Real World

1. Daraz’s Warehouse Layout (Hybrid Model)

Daraz uses a combination of product and cellular layouts:

• Product Layout: For bulk items (e.g., electronics, groceries) → fast picking.
• Cellular Layout: For small batches (e.g., books, cosmetics) → flexible grouping.
• Result: Faster order fulfillment, lower shipping costs, and higher customer satisfaction.

2. NTC’s Call Center (Process Layout)

Nepal Telecom’s (NTC) customer service call center uses a process layout:

• Grouped by function:
  • Billing Department (handles payments)
  • Technical Support (troubleshooting)
  • Complaints Handling (customer grievances)
• Why?
  • Flexibility: Agents can handle multiple types of calls.
  • Specialization: Workers become experts in their domain.

3. Himalayan Java’s Coffee Processing (Fixed-Position + Batch)

Himalayan Java’s coffee processing involves:

1. Fixed-Position: Large coffee beans are roasted in batch roasters (fixed location).
2. Batch Processing: Different coffee blends are processed in small batches.

• Efficiency: Reduces waste by 20%.
• Quality Control: Ensures consistent flavor profiles.

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Exam Tip

How to Score Full Marks in TU Exams

1. Define Clearly
   • Always start with definitions (e.g., "Process selection is the decision-making activity...").
2. Use Diagrams
   • Draw mindmaps for process types and flowcharts for facility layouts.
3. Compare & Contrast
   • Use tables to differentiate between job shop vs. mass production or product vs. process layout.
4. Apply to Real Cases
   • Relate to Nepali companies (e.g., Daraz, Nabil Bank, NTC).
   • Example answer:

     "Nepal Biscuit Factory uses a product layout because it produces high-volume, standardized biscuits. This reduces material handling costs and increases efficiency."

5. Calculate Where Applicable
   • If given setup costs or production volumes, calculate optimal process choice.
6. Highlight Trade-offs
   • Example:

     "While mass production reduces per-unit cost, it lacks flexibility for custom orders."

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Common Mistakes to Avoid

❌ Mixing up process types (e.g., calling a bakery a "continuous process" when it’s batch). ❌ Ignoring real-world examples (examiners love Nepali case studies). ❌ Not explaining "why" (always justify your choice with cost, volume, or flexibility). ❌ Poor diagrams (use Mermaid mindmaps instead of messy text).

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Final Checklist Before Exam

✅ Can I define process selection and facility layout in one sentence? ✅ Can I draw a mindmap comparing all four process types? ✅ Can I explain Daraz/Nabil Bank’s layout with pros and cons? ✅ Can I calculate which process is best for a given scenario? ✅ Do I know at least 3 Nepali examples (Daraz, NTC, Himalayan Java, etc.)?

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