This lesson covers the calculation and interpretation of the most common variances for direct materials and direct labour. It explains how to break down total variances into price and usage (or rate and efficiency) components.

  • The Variances: A variance is the difference between the standard cost and the actual cost for a given activity. Variances can be:

    • Favourable (F): When the actual cost is less than the standard cost.

    • Adverse (A): When the actual cost is greater than the standard cost.

  • Direct Material Variances: The total material variance is broken down into:

    • Direct Material Price Variance: Measures the difference between the actual price paid and the standard price for materials.

      • Formula: (Standard Price – Actual Price) × Actual Quantity

    • Direct Material Usage Variance: Measures the difference between the actual quantity of materials used and the standard quantity that should have been used for the actual output.

      • Formula: (Standard Quantity – Actual Quantity) × Standard Price

  • Direct Labour Variances: The total labour variance is broken down into:

    • Direct Labour Rate Variance: Measures the difference between the actual hourly wage rate and the standard hourly rate.

      • Formula: (Standard Rate – Actual Rate) × Actual Hours Worked

    • Direct Labour Efficiency Variance: Measures the difference between the actual hours worked and the standard hours that should have been worked for the actual output.

      • Formula: (Standard Hours – Actual Hours) × Standard Rate

  • Purpose of Analysis: Investigating variances helps management identify the root causes of performance differences. For example, a favourable price variance may be due to bulk discounts, while an adverse usage variance could indicate waste or inefficiency. By understanding these causes, management can take action to improve performance .

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