Margin loss often begins before approval
Incorrect currency, missing freight, unallocated duty and misunderstood scope can erode margin before a reviewer sees the final percentage. Margin control must begin with the cost basis.
Use consistent commercial rules
Define approved approaches for exchange rates, freight allocation, duty, discounts and rounding. Consistency makes exceptions visible and reduces dependence on individual spreadsheets.
Distinguish margin from markup
Markup is calculated on cost while gross margin is calculated on selling price. Confusing the two can produce a lower return than intended. Systems and reports should label the measure explicitly.
Review the commercial context
A rule based recommendation is a starting point. Customer strategy, competitive position, payment terms, warranty and project risk still require commercial judgment before approval.