# ADR 0016: Won / Lost Lifecycle Governance

## Status

Accepted

## Context

CRM dashboard and reporting previously treated quotation acceptance and rejection as proxies for opportunity outcomes. That made business outcome data unstable because:

- quotation approval/acceptance does not equal PO received
- lost opportunities could be inferred without a required lost reason
- reopen rules were undefined
- revenue and win/loss KPI logic depended on quotation status instead of the enquiry lifecycle

Business Discovery 3.0 froze the production rule set:

- `closed_won` means PO received
- `closed_lost` requires a lost reason
- won cannot reopen
- lost can reopen with audit
- won revenue prefers PO amount and falls back to quotation total
- lost revenue uses quotation total

## Decision

We use `crm_enquiries` as the official business outcome record.

We add outcome fields on `crm_enquiries`:

- `closed_won_at`
- `closed_lost_at`
- `closed_by_user_id`
- `po_number`
- `po_date`
- `po_amount`
- `po_currency`
- `lost_reason`
- `lost_competitor`
- `lost_remark`

We add `crm_enquiry_attachments` for purchase order files with category `purchase_order`.

All lifecycle transitions must go through the enquiry outcome service layer:

- `markEnquiryAsWon()`
- `markEnquiryAsLost()`
- `reopenLostEnquiry()`

Quotation status is no longer allowed to mutate enquiry outcome automatically.

## Consequences

- dashboard won/lost KPI must read enquiry `pipeline_stage`
- marketing can see outcome state but PO amount remains server-side restricted
- PO attachment access follows commercial-data visibility rules
- audit coverage expands to `mark_won`, `mark_lost`, `reopen`, and `upload_po`
- downstream reporting can reuse a stable outcome model for Task K
