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Identify the chosen denominator
An example uses average operating capital of 600 and NOPAT 75, giving 12.5%. A report may also show gross debt-plus-equity funding of 750 that includes nonoperating assets. Substituting 750 gives 10%, which is a different defined ratio.
Check average versus ending balances
If operating capital grows during the year, an ending balance can differ from the period average. The earnings figure covers the whole period. A ratio using one convention should not be compared with another without reconciliation.
Retain a basis table
| Field | Check |
|---|---|
| Operating scope | Which assets and liabilities belong? |
| Nonoperating amounts | What is excluded? |
| Balance dates | Average or ending? |
| Numerator match | Same operating activities and period? |
Avoid explaining every increase as better operations
A write-off or excluded asset can lower a base and raise a ratio without an equivalent rise in cash-generating ability. Trace changes rather than turning the result into an automatic improvement claim.