Engineering Change Request (ECR)¶
Use after a subsystem passes CAD Lock. Any dimensional change, material change, motor change, or gear-ratio change must go through this form.
ECR ID: ECR-YYYY-###
Date: YYYY-MM-DD
Requester (student):
Subsystem:
Affected parts (part numbers):
Change Description¶
What is changing? (One paragraph.)
Reason¶
Why is this change required?
- Bug / interference discovered in assembly
- Failure during testing (link failure-log entry)
- Performance below numeric target
- Weight over budget
- Supplier substitution (part unavailable)
- Other:
Impact Analysis¶
- Parts revised (numbers + rev bump):
- Downstream subsystems affected:
- New weight (if changed):
- New COG (if changed):
- Software impact:
- Cost delta:
- Machining time delta:
Alternatives Considered¶
Why not just leave it? What did we try first?
Approval¶
- Subsystem CAD Owner
- CAD Lead (master model check)
- Affected downstream Subteam Leads
- Mechanical Mentor
Approvals signed: ____
Implementation¶
- New part rev letter:
- Old rev fabrication tickets killed: Yes / No
- BOM updated: Yes / No
- Kanban updated: Yes / No
- ECR closed on: YYYY-MM-DD