Labour Cost Control: Wages, Efficiency, Idle Time & Overtime

TAKEAWAYS:

• Labour costs are classified into direct and indirect wages, and understanding their components is critical for cost control.
• Timekeeping systems (e.g., clock cards, biometric devices) ensure accurate recording of working hours and productivity.
• Labour efficiency is measured using ratios like Efficiency Ratio = (Standard Hours / Actual Hours) × 100, and deviations trigger corrective actions.
• Idle time and overtime must be analyzed separately to distinguish between avoidable and unavoidable losses.
• Labour cost variance analysis helps managers identify inefficiencies and take corrective actions.
• Real-world applications include Pathao’s driver payroll systems, NTC’s labour cost tracking for infrastructure projects, and banking sector wage controls for tellers and loan officers.

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1. Introduction to Labour Cost Control

Labour cost is a significant component of total production cost, often accounting for 30-60% of total expenses in manufacturing and service industries. Effective labour cost control ensures:

• Optimal utilization of workforce
• Reduction of unnecessary expenses
• Improvement in productivity

1.1 Components of Labour Cost

Labour costs can be broadly classified into:

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2. Timekeeping and Labour Efficiency

Accurate timekeeping is essential to measure actual labour hours and compare them with standard hours to assess efficiency.

2.1 Timekeeping Methods

2.2 Labour Efficiency Calculation

Efficiency is measured using the Efficiency Ratio:

$$\text{Efficiency Ratio}=\left(\frac{\text{Standard Hours}}{\text{Actual Hours}}\right)\times 100$$

Example: A Kathmandu-based furniture maker produces 100 chairs in 8 hours (standard time = 10 hours). $$\text{Efficiency}=\left(\frac{10}{8}\right)\times 100=125\%$$ Interpretation:

• >100% → Over-efficient (workers worked faster than standard).
• <100% → Under-efficient (workers took longer than expected).

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3. Idle Time and Overtime Analysis

3.1 Causes of Idle Time

Idle time occurs when workers are paid but not productive. Common causes:

Mermaid Diagram: Causes of Idle Time

3.2 Overtime and Its Impact

Overtime is paid at 1.5x to 2x the normal wage rate. While it helps meet deadlines, excessive overtime increases costs.

Example: NTC Construction Project

• Standard Hours: 8 hours/day
• Overtime Hours: 3 hours/day at 1.5x rate
• Cost Impact:
  • Normal wage = NPR 500/hour
  • Overtime wage = NPR 750/hour
  • Daily Overtime Cost = 3 × 750 = NPR 2,250

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4. Labour Cost Variance Analysis

Variance analysis helps identify why labour costs differ from budgeted amounts.

4.1 Types of Labour Cost Variances

Example: Khalti App Development Team

• Standard Rate: NPR 1,000/hour (junior developer)
• Actual Rate: NPR 1,500/hour (hired senior developer)
• Actual Hours Worked: 40 hours
• Standard Hours Allocated: 50 hours

Calculations:

1. Labour Rate Variance: $$(1,500-1,000)\times 40=+NPR20,000\text{ (Unfavorable)}$$ (Higher cost due to senior developer.)

2. Labour Efficiency Variance: $$(40-50)\times 1,000=-NPR10,000\text{ (Favorable)}$$ (Work completed faster than expected.)

Net Labour Cost Variance = +NPR 10,000 (Unfavorable)

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5. Labour Cost Control Techniques

5.1 Preventive Measures

5.2 Corrective Measures

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6. Real-World Applications

6.1 Pathao Driver Payroll System

• Labour Cost Control Idea: Timekeeping & Overtime Management
• How It Works:
  • Drivers log in/out via app (biometric time tracking).
  • Overtime is automatically calculated and paid at 1.5x rate.
  • Idle time (e.g., waiting for passengers) is monitored to optimize routes.

6.2 NTC Infrastructure Projects

• Labour Cost Control Idea: Idle Time Reduction & Efficiency Analysis
• How It Works:
  • Standard hours are set for road construction tasks.
  • Efficiency ratios are calculated weekly to identify delays.
  • Avoidable idle time (e.g., waiting for materials) is minimized via better logistics.

6.3 Banking Sector (Nabil Bank, Global IME)

• Labour Cost Control Idea: Labour Mix & Training
• How It Works:
  • Tellers are trained to handle multiple transactions efficiently.
  • Branch managers analyze labour efficiency variance to decide hiring needs.
  • Overtime is restricted to avoid burnout and extra costs.

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7. Numerical Example: Labour Cost Control in a Kathmandu Retail Shop

Scenario: Mr. Sharma runs a Kathmandu-based retail shop selling electronics. He employs:

• 2 sales assistants (direct labour)
• 1 security guard (indirect labour)
• 1 manager (indirect labour)

Given Data (for 1 month):

Calculations:

A. Labour Rate Variance

$$\text{Actual Rate}=\frac{\text{Total Wages Paid}}{\text{Actual Hours}}=\frac{180\times 1,500}{180}=NPR1,500/\text{hour}$$ $$\text{Labour Rate Variance}=(1,500-1,200)\times 180=+NPR54,000\text{ (Unfavorable)}$$

B. Labour Efficiency Variance

$$\text{Labour Efficiency Variance}=(180-160)\times 1,200=-NPR24,000\text{ (Favorable)}$$

C. Overtime Cost

$$\text{Overtime Wage}=10\times (1,500\times 1.5)=NPR22,500$$

D. Idle Time Cost

$$\text{Idle Time Cost}=5\times 1,500=NPR7,500$$

E. Total Labour Cost

$$\text{Total Labour Cost}=(\text{Actual Hours}\times \text{Actual Rate})+\text{Overtime}+\text{Idle Time}$$ $$=(180\times 1,500)+22,500+7,500=NPR300,000$$

Recommendations for Mr. Sharma:

1. Reduce idle time by improving stock management.
2. Train sales assistants to increase efficiency.
3. Limit overtime to control extra costs.
4. Standardize wage rates to avoid unnecessary increases.

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Exam Tip

How This Unit is Examined (TU/PU/NEB Pattern)

1. Short Questions (5-10 marks):

   • Define labour efficiency ratio, idle time, overtime.
   • Differentiate between direct and indirect wages.
   • Explain labour rate variance vs. labour efficiency variance.

2. Long Questions (15-25 marks):

   • Calculate labour cost variance given data (like the Kathmandu shop example).
   • Analyze idle time causes and suggest control measures.
   • Prepare a labour cost statement with Dr/Cr entries.

3. Case Study (20-30 marks):

   • Real-world scenario (e.g., a Daraz warehouse or NTC project) requiring:
     • Efficiency ratio calculation.
     • Variance analysis.
     • Recommendations for cost control.

Common Mistakes to Avoid: ❌ Ignoring overtime and idle time in calculations. ❌ Mixing standard and actual rates in variance formulas. ❌ Not interpreting favorable/unfavorable variances correctly. ❌ Forgetting fringe benefits in total labour cost.

Pro Tip:

• Memorize the efficiency ratio formula and variance formulas.
• Practice numericals using Nepali business examples (e.g., garment factories, banks, construction).
• Draw T-accounts for labour cost entries in journals.

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