Understanding Labor Variances in Cost Accounting:

Labor efficiency variance measures the difference between the actual hours worked and the standard hours allowed for actual production.

Labor rate variance measures the difference between the actual labor cost per hour and the standard rate set for labor.

Why Options 1 (Favorable Labor Efficiency Variance) and 2 (Adverse Labor Rate Variance) Are Correct?

Favorable Labor Efficiency Variance (1):

Hiring more experienced researchers should lead to higher productivity, meaning that the team completes tasks faster, reducing the total labor hours required.

This results in a favorable labor efficiency variance because less time is spent on the project than initially expected.

Adverse Labor Rate Variance (2):

More experienced employees command higher salaries, leading to an increase in labor costs per hour compared to the budgeted rate.

This results in an adverse labor rate variance because the actual wage rate exceeds the standard rate.

Why Other Options Are Incorrect?

Option 3 (Adverse Labor Efficiency Variance):

This would occur if the new hires were less productive, which contradicts the scenario.

Option 4 (Favorable Labor Rate Variance):

A favorable variance in labor rate occurs when labor costs are lower than expected, which is unlikely when hiring more experienced (higher-paid) employees.

Hiring more experienced employees improves efficiency (favorable efficiency variance) but increases wages (adverse rate variance).

IIA Standard 1220 – Due Professional Care requires auditors to consider operational efficiency in decision-making evaluations.

Final Justification:IIA References:

IPPF Standard 1220 – Due Professional Care

IIA Practice Guide – Assessing Business Performance Metrics