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# Conclusion The selected target is **10 of 13 fields structurally covered** by consultant-confirmed exact mappings. Each covered field maps to a current column with the same qualified name and matching declared/observed data type. The required action is `reuse_as_is`. No partial or transformed mapping is recorded in the selected mapping cases. The remaining three fields are confirmed gap cases rather than partial mappings. ## Exact mappings | Target | Current | Type | Decision | |---|---|---|---| | `Account.AccountKey` | `Account.AccountKey` | Int64 | Exact; reuse as is | | `Account.AccountName` | `Account.AccountName` | String | Exact; reuse as is | | `Account.AccountType` | `Account.AccountType` | String | Exact; reuse as is | | `Calendar.DateKey` | `Calendar.DateKey` | Int64 | Exact; reuse as is | | `Calendar.Date` | `Calendar.Date` | DateTime | Exact; reuse as is | | `Calendar.FiscalMonth` | `Calendar.FiscalMonth` | Int64 | Exact; reuse as is | | `Ledger.DateKey` | `Ledger.DateKey` | Int64 | Exact; reuse as is | | `Ledger.AccountKey` | `Ledger.AccountKey` | Int64 | Exact; reuse as is | | `Ledger.SignedAmount` | `Ledger.SignedAmount` | Decimal | Exact; reuse as is | | `Ledger.IsAdjustment` | `Ledger.IsAdjustment` | Boolean | Exact; reuse as is | ## Confirmed gap cases | Target | Comparison finding | Required action | |---|---|---| | `Account.AccountGroup` | No current candidate selected | Acquire or source | | `Ledger.CostCentre` | No current candidate selected | Acquire or source | | `Ledger.CurrencyCode` | No current candidate selected | Acquire or source | ## What exact mapping does and does not prove The decisions establish reuse at the field-mapping level. They do not by themselves prove: - key uniqueness or referential integrity; - acceptable null rates and value domains; - equivalent business semantics over production data; - correct fiscal calendar behaviour; - that `Ledger.SignedAmount` already has the intended reporting-currency semantics; - implementation in a separate target model. Those matters require acceptance tests or broader evidence.