In: Operations Management
Londonderry Company’s Widget Plant produces widgets for industrial use. The plant uses a standard cost system with the following standard variable cost per widget.
Standard Qty Standard Price
or Hours or Rate
Standard Cost
Direct Materials………………………… 4.0 pounds $2.50 per pound
Direct Labor………………………………. 0.6 hours $9.00 per hour
During April, the plant produced 5,000 widgets and incurred the following costs:
a. Purchased and used 20,000 pounds of materials at a cost of $2.95 per pound.
b. Worked 3,600 direct labor hours at a cost of $8.70 per hour.
Required: (use the variance analysis template, if desired)
1. Compute the following variances for April:
a. Direct materials price and quantity variances.
b. Direct labor rate and efficiency variances.
2. Pick out the two most significant variances that you computed above (there are four in total). Explain possible causes for these variances.
Solution-
Widget produced = 5000 widget
A. Given Data,
Standard cost of direct material per widget = $ 2.50 per pound
Actual cost incurred = $ 2.95 per pound
Actual materials used- 20000 pounds
Standard materials used - 5000*4 = 20000 pounds
Direct materials price variance = ( Standard cost ? Actual cost ) × Actual quantity = (2.50 - 2.95)*20000 = -9000
Quantity variance = (Actual quantity used - Standard quantity used) x Standard cost per unit = (20000-20000) * 2.50 = 0
B. Given data,
Actual labour hours worked- 3600 hours
Actual labour cost = $ 8.70 per hour
Standard labour cost = $ 9 per hour
Standard labour hours required = 5000*0.6 = 3000 hours
Labor rate variance = (Actual rate - Standard rate) x Actual hours worked = (8.70 - 9.0) * 3600 = -1080
Direct labor efficiency variance = (Actual hours worked - Standard hours allowed) × Standard rate
= (3600 - 3000) * 9 = 5400
2. Two most significant variances would be the variances with greater value. therefore Direct materials price variance and Direct labor efficiency variance are the two most significant variance.
Possible cause for Direct materials price variance is the large difference between actual material price and standard material price.
Possible cause for direct labour efficiency variance is large difference betweek actual labour hour worked and standard labour hours allowed.