NetSuite Work Order Labor Variance Calculator
When a work order closes, the difference between standard and actual labor cost hides two different stories: paying a different rate and taking a different number of hours. This calculator separates them so you know whether to look at wages and crew mix, or at routing times and shop floor performance.
Your numbers
Your results
Sign convention: positive variance means actual cost exceeded standard (unfavorable). Your ledger may use the opposite sign.
Variance vs actual hours booked
Sweeps Actual hours booked from 400 to 900, holding your other inputs fixed.
Work order variance analysis
Optional: we can outline a read-only variance ranking by routing and work center from your NetSuite work orders.
Optional. The tool and every export work without this. No spam.
How to use it
Enter the good units completed, the routing standard hours per unit, the hours actually booked and the standard and actual hourly rates. Use totals across the period or one work order. The calculator shows standard cost, actual cost, rate variance, efficiency variance and their sum, which equals actual minus standard cost. Slide the actual hours to see how quickly efficiency variance grows, which helps set realistic tolerance thresholds for investigation.
The formulas
Rate variance is the actual rate minus the standard rate, times actual hours. Efficiency variance is actual hours minus standard hours allowed, times the standard rate. Their sum equals total labor variance, actual cost minus standard cost. Labor efficiency is standard hours allowed divided by actual hours. Standard hours allowed are based on good output, so scrap and rework hours show up as unfavorable efficiency. Keeping rate and efficiency separate prevents a wage increase from being blamed on the shop floor.
- Rate variance points to wages, overtime and crew mix
- Efficiency variance points to routing times, scrap and downtime
- Both use actual hours or standard rate in specific places, keep them consistent
Common mistakes
A common error is measuring standard hours on started units rather than good units, hiding scrap. Another is mixing labor from different work centers with different rates into one average, which makes rate variance meaningless. Also watch for unposted time: if hours are booked days after the work order closes, variances land in the wrong period. Investigate by exception, such as variances above a threshold percentage of standard, rather than reviewing every order.
Frequently Asked Questions
Is a positive variance good or bad?
With this calculator's convention, positive means actual cost exceeded standard, which is unfavorable. Many ledgers show unfavorable variances as debits, but sign conventions differ, so check how your reports present them.
Why use actual hours in rate variance?
Rate variance measures the price effect on the hours actually worked. Efficiency variance prices the hour difference at the standard rate. Together they add up exactly to actual minus standard cost.
How do I reduce efficiency variance?
Start by checking routing standards against reality, then look at scrap, rework, setup time, material shortages and downtime. If the standard itself is stale, fix the standard rather than push the floor.
Can I use this for machine time?
Yes. Replace labor hours and rates with machine hours and machine rates. The same split between rate and efficiency applies.
Netray can analyze closed work orders in your NetSuite data and rank the routings and work centers that drive the largest recurring variances.
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