Atid-495 - !!better!!

ATID-495: Unraveling the Mystery Behind the Code

• ATID-395: Information Design or equivalent
• Permission of the instructor

3. Root‑Cause Analysis (Why It Happened)

| Area | Findings | |------|----------| | Code | e.g., Tax calculation routine incorrectly uses isTaxable flag from the UI instead of the backend product metadata. | | Data | e.g., Legacy data migration left some products with a missing taxable flag, defaulting to true. | | Process | e.g., Recent refactor removed a validation step that ensured tax rules are re‑applied after cart edits. | | External Dependency | e.g., Third‑party tax service returned a 200‑OK response with an empty payload, which the client interpreted as “tax due”. | ATID-495

Conclusion and Future Directions