# AIelsen FDE Academy / Data and reconciliation contract

For education or authorized internal work. Do not include secrets, customer identities or keys. Examples are teaching scenarios; actual legal and commercial arrangements require professional review.

## How to use

Read the related lesson. Give a decision, evidence location, version and owner for each field. Mark unknowns as unverified; do not have a model invent facts.

### 1. Source and authority

- Content / decision:
- Evidence / version:
- Owner / open question:

### 2. Fields and types

- Content / decision:
- Evidence / version:
- Owner / open question:

### 3. Unique key

- Content / decision:
- Evidence / version:
- Owner / open question:

### 4. Units and timezone

- Content / decision:
- Evidence / version:
- Owner / open question:

### 5. Freshness

- Content / decision:
- Evidence / version:
- Owner / open question:

### 6. Null handling

- Content / decision:
- Evidence / version:
- Owner / open question:

### 7. Deduplication

- Content / decision:
- Evidence / version:
- Owner / open question:

### 8. Quarantine

- Content / decision:
- Evidence / version:
- Owner / open question:

### 9. Lineage

- Content / decision:
- Evidence / version:
- Owner / open question:

### 10. Input count

- Content / decision:
- Evidence / version:
- Owner / open question:

### 11. Output count

- Content / decision:
- Evidence / version:
- Owner / open question:

### 12. Reconciliation gap

- Content / decision:
- Evidence / version:
- Owner / open question:

### 13. Idempotency

- Content / decision:
- Evidence / version:
- Owner / open question:

### 14. Interface availability

- Content / decision:
- Evidence / version:
- Owner / open question:

## Practice and review

Synthetic logistics exercise: loaded on time means warehouse scan in one system and truck departure in another. Equal booleans do not establish identical events. Model timestamps, deadlines and responsible roles before defining delay. This is not a verified customer case.

- [ ] Raw data stays unchanged.
- [ ] Failures are not silently swallowed.
- [ ] Outputs trace to data and rule versions.

## Revision log

| Version | Date | Change | Evidence | Owner |
|---|---|---|---|---|
| v0.1 | | | | |

AIelsen FDE Academy · Educational worksheet · 2026