428 Chapter 23 Performance Evaluation Using Variances from Standard Costs
overhead costs and the budgeted variable overhead for actual production. It is computed as: variable
factory overhead controllable variance = actual variable factory overhead – budgeted variable factory
overhead. The budgeted variable overhead is computed as: budgeted variable factory overhead = standard
hours for actual units produced × variable factory overhead rate. The variable factory controllable
variance is computed as: variable factory overhead controllable variance = actual variable factory
overhead – budgeted variable factory overhead. The fixed factory overhead volume variance is the
difference between the budgeted fixed overhead at 100% of normal capacity and the standard fixed
overhead for the actual units produced computed as: fixed factory overhead volume variance = (standard
hours for 100% of normal capacity – standard hours for actual units produced) × fixed factory overhead
rate. The volume variance measures the use of fixed overhead resources. Management should determine
the causes of the unfavorable variance and consider taking corrective action. The total factory overhead
cost variance can also be determined as the sum of the variable factory overhead costs. The factory
overhead cost variance report is shown in Exhibit 10. At the end of the period, the factory overhead
account normally has a balance. A debit balance in Factory Overhead represents underapplied overhead,
which occurs when actual factory overhead costs exceed the applied factory overhead. A credit balance in
Factory Overhead occurs when actual factory overhead costs are less than the actual applied factory
overhead. If the actual factory overhead exceeds the budgeted factory overhead, the controllable variance
is unfavorable. If the actual factory overhead is less than the budgeted factory overhead, the volume
variance is unfavorable.
Key Terms and Definitions
• Budgeted Variable Factory Overhead – The standard variable overhead for the actual units
produced.
• Controllable Variance – The difference between the actual amounts of variable factory overhead
cost incurred and the amount of variable factory overhead budgeted for the standard product.
• Factory Overhead Cost Variance Report – Reports budgeted and actual costs for variable and
fixed factory overhead along with the related controllable and volume variances.
• Volume Variance – The difference between the budgeted fixed overhead at 100% of normal
capacity and the standard fixed overhead for the actual production achieved during the period.
Relevant Example Exercises and Exhibits
• Example Exercise 23-3 Factory Overhead Controllable Variance
• Example Exercise 23-4 Factory Overhead Volume Variance
• Exhibit 8 – Factory Overhead Cost Budget Indicating Standard Factory Overhead Rate
• Exhibit 9 – Graph of Fixed Overhead Volume Variance
• Exhibit 10 – Factory Overhead Cost Variance Report
• Exhibit 11 – Factory Overhead Variances
SUGGESTED APPROACH
Consider spending extra time covering factory overhead variances, since students seem to have the most
difficulty with these variances. One of the major reasons for this is that, while direct materials and direct
labor costs are variable, factory overhead costs have both fixed and variable components. You can
continue the pattern of demonstrating variance calculations and asking students to practice these
computations, using the aids below.