Make the result useful
work-order variance
This worksheet makes work-order variance explicit from the exact figures you enter. Review the period and basis of every amount before comparing results.
Use a conservative scenario as well as the base scenario; the calculation describes assumptions rather than predicting behavior.
The assumptions that move this result
Budget
Approved work-order amount.
Invoice
Vendor billed amount.
Materials
Additional documented materials.
vendor invoice + materials − approved budget
Read the result as a planning measure for the selected period.
Read the number in context
Worked scenario
$780 + $120 − $650 = $250 over budget.
Edge case
A change order can be valid but still requires separate approval.
It does not validate scope, invoices, or approvals.
Before you act
• Confirm every input uses the same time period.
• Test a downside scenario before relying on the result.
• Keep source records with the decision.
Formula
vendor invoice + materials − approved budget
What period should I use?
Use one consistent reporting or planning period for every input.
Does this predict performance?
No. It only performs the stated arithmetic.
Can it replace records or advice?
No. Confirm decisions with source records and appropriate professional guidance.