# 3.5 Approval Workflow Requirements

## Core Goals
- Establish multi-level approval hierarchies that align with organizational roles and dollar thresholds.
- Offer configurable routing rules by department, category, and delegation of authority limits.
- Capture digital signatures and maintain detailed audit trails for every approval action.

## Functional Expectations
- Workflows should evaluate request amount, category, and requester to determine approver chains.
- Support escalations, delegations, and reassignment when approvers are unavailable.
- Record signature artifacts (timestamp, user, method) and persist immutable approval logs.

## Implementation Notes
- Leverage the workflow engine to define approval steps and integrate with procurement records.
- Ensure audit entries link to procurement requests for compliance reviews.
- Provide UI status trackers so users can monitor approval progress in real time.