Standard Costing & Variance Analysis: Methods, Variances & Control

TAKEAWAYS:

• Standard costing assigns predetermined costs to products/services to measure performance against actual costs.
• Variances (favorable/unfavorable) reveal inefficiencies in material usage, labor productivity, or overhead control.
• Material variances = (Actual Quantity × Standard Price) – (Standard Quantity × Standard Price).
• Labor variances = (Actual Hours × Standard Rate) – (Standard Hours × Standard Rate).
• Overhead variances include volume, spending, and efficiency variances—each with distinct formulas.
• Real-world examples show how Kathmandu’s garment factories and NTC’s inventory systems use these tools.

1. What is Standard Costing?

Standard costing is a cost accounting technique that assigns predetermined costs (standard costs) to products or services. These standards are set based on historical data, engineering studies, or industry benchmarks. The goal is to compare actual costs with standard costs to identify variances and improve efficiency.

Why Use Standard Costing?

graph TD
    A["Standard Costing"] --> B["Sets Benchmarks"]
    A --> C["Simplifies Costing"]
    A --> D["Highlights Variances"]
    A --> E["Improves Decision-Making"]
    A --> F["Enhances Budgeting"]

Example: A Kathmandu-based garment manufacturing company sets standard costs for fabric, labor, and overhead per shirt. If actual costs exceed standards, managers investigate why (e.g., fabric wastage, inefficient sewing machines).

2. Types of Standard Costs

Standard costs are classified into three categories:

Key Point:

• Ideal standards are motivating but unrealistic.
• Normal standards are practical for performance evaluation.
• Currently attainable standards are used for short-term control.

3. Variance Analysis: The Core of Standard Costing

Variances are the differences between actual costs and standard costs. They help managers identify where costs are out of control.

A. Material Variances

Material variances arise from differences in price or quantity used.

1. Material Price Variance (MPV) Formula: $$MPV=(AP-SP)\times AQ$$

   • $AP$ = Actual Price per unit
   • $SP$ = Standard Price per unit
   • $AQ$ = Actual Quantity purchased

2. Material Quantity Variance (MQV) Formula: $$MQV=(AQ-SQ)\times SP$$

   • $SQ$ = Standard Quantity allowed for actual production

Worked Example: A Kathmandu Fabric Shop

• Standard: 2 kg of cotton at Rs 500/kg per shirt.
• Actual: 2.5 kg purchased at Rs 520/kg for 100 shirts.

Why?

• Price increase (Rs 20/kg) → Unfavorable MPV.
• Extra fabric used (0.5 kg/shirt) → Unfavorable MQV.

Corrective Action:

• Negotiate better rates with suppliers.
• Train workers to reduce fabric wastage.

B. Labor Variances

Labor variances occur due to differences in wages paid or hours worked.

1. Labor Rate Variance (LRV) Formula: $$LRV=(AR-SR)\times AH$$

   • $AR$ = Actual Rate per hour
   • $SR$ = Standard Rate per hour
   • $AH$ = Actual Hours worked

2. Labor Efficiency Variance (LEV) Formula: $$LEV=(AH-SH)\times SR$$

   • $SH$ = Standard Hours allowed for actual production

Worked Example: A NTC Cable Assembly Unit

• Standard: 5 hours at Rs 400/hour per cable.
• Actual: 6 hours at Rs 420/hour for 20 cables.

Why?

• Higher wages paid (Rs 20/hour) → Unfavorable LRV.
• More hours taken (1 hour/cable) → Unfavorable LEV.

Corrective Action:

• Cross-train workers to improve efficiency.
• Review wage structures to align with productivity.

C. Overhead Variances

Overhead variances are more complex and include:

1. Overhead Spending Variance (OSV) $$OSV=\text{Actual Overhead}-\text{Standard Overhead}$$
2. Overhead Volume Variance (OVV) $$OVV=\text{Standard Overhead}-(\text{Standard Overhead Rate}\times \text{Actual Hours})$$
3. Overhead Efficiency Variance (OEV) $$OEV=(\text{Actual Hours}-\text{Standard Hours})\times \text{Standard Overhead Rate}$$

Worked Example: A Kathmandu Electronics Factory

• Standard Overhead: Rs 10,000 for 500 machine hours (Rs 20/hour).
• Actual: Rs 12,000 for 450 hours.

Why?

• Higher actual overhead (Rs 12,000 vs. budgeted Rs 9,000) → Unfavorable OSV.
• Fewer hours used (450 vs. 500) → Favorable OVV and OEV.

Corrective Action:

• Reduce utility costs (e.g., switch to solar power).
• Optimize machine usage to avoid idle time.

4. Causes of Variances (With Real-World Examples)

5. The Accounting Cycle for Standard Costing

Standard costing integrates with the general ledger through journal entries. Here’s how variances are recorded:

graph TD
    A["Standard Costing Cycle"]
    A --> B["Set Standards"]
    A --> C["Record Actual Costs"]
    C --> D["Calculate Variances"]
    D --> E["Analyze & Control"]
    E --> F["Update Standards"]
    F -->|"loop"| A

Journal Entry Example (Material Variances):

6. Advantages and Disadvantages of Standard Costing

7. Real-World Applications in Nepal

Example 1: NTC’s Inventory Management

• Problem: NTC faces material quantity variances due to cable theft and spoilage.
• Solution: Standard costing helps track actual vs. standard cable usage, revealing losses.
• Outcome: NTC reduces losses by 20% through better storage and security.

Example 2: Kathmandu Garment Factories

• Problem: Labor efficiency variances due to poor sewing machine maintenance.
• Solution: Standard costing identifies excessive downtime, leading to preventive maintenance.
• Outcome: 15% increase in productivity with the same workforce.

Example 3: Daraz’s Supplier Negotiations

• Problem: Material price variances due to fluctuating raw material costs.
• Solution: Standard costing helps Daraz compare actual supplier prices against benchmarks.
• Outcome: Daraz secures better rates by switching suppliers.

8. Exam Tip: How to Score Full Marks

1. Always define terms clearly (e.g., "Standard costing is a cost accounting technique...").
2. Show calculations step-by-step (use tables for variances).
3. Explain causes and corrective actions (examiners love real-world links).
4. Use Nepali examples (Kathmandu hotels, NTC, Daraz, garment factories).
5. Distinguish between favorable and unfavorable variances (this is a common mistake).
6. For numericals:
   • Write formulas first.
   • Show intermediate steps.
   • Box final answers.
7. Compare methods (e.g., "Normal vs. Ideal Standards" or "MPV vs. MQV").

Common Pitfalls to Avoid:

• ❌ Forgetting to label variances as favorable/unfavorable.
• ❌ Misapplying standard hours vs. actual hours in labor variances.
• ❌ Ignoring overhead variances (they often carry extra marks).
• ❌ Not linking answers to real-world scenarios.

Final Note: Standard costing is not just about numbers—it’s about control, efficiency, and decision-making. Master this unit, and you’ll ace both theoretical and numerical questions in your TU exams! 🚀