ECO-1042: Main Compute PCBA Rev B → Rev C
Read-onlyTransition the Main Compute PCBA from Rev B to Rev C to resolve thermal throttling caused by an obsolescence-driven voltage-regulator substitution. The new pinout requires the Compute-to-Drive Wiring Harness to move from Rev 1 to Rev 2 as well.
Closed all four mitigation outcomes: two PCBA cancellations, one accepted PCBA loss and one harness conversion. — 7/29/2026, 8:14:45 PM
Current financial position
Exposure certainty
100%
Executive decision report
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DeltaLedger
Engineering change decision record
Engineering change · Draft
ECO-1042: Main Compute PCBA Rev B → Rev C
Transition the Main Compute PCBA from Rev B to Rev C to resolve thermal throttling caused by an obsolescence-driven voltage-regulator substitution. The new pinout requires the Compute-to-Drive Wiring Harness to move from Rev 1 to Rev 2 as well.
Decision posture
Evidence supports financial review
No unresolved exposure, stale provenance, or open outcome currently prevents this record from being reviewed.
Gross exposure
$83,200.00
Mitigation benefit
$37,480.00
Remaining financial impact
$36,520.00
Evidence
100% fully verified
DeltaLedger
Engineering Change Exposure & Outcome Report
Executive summary · 02
Engineering Change
ECO-1042: Main Compute PCBA Rev B → Rev C
Status
Draft
Owner
Elena Suárez (unverified)
Generated
7/31/2026, 12:31:21 AM
This engineering change is read-only. This report reflects its finalized, locked state.
EXECUTIVE SUMMARY
$74,000.00 of net exposure across 4 records.
Across 4 recorded mitigation outcomes, $48,800.00 of value was avoided or preserved. $11,320.00 of mitigation costs and $25,200.00 of unavoided write-offs produce $36,520.00 of total realized loss.
Net mitigation benefit to date: $37,480.00.
Decision brief
Decision requested
Accept the financial outcome and close the change
Recommended posture
Proceed to financial review using the remaining impact and supporting evidence below.
Evidence limitation
4 of 4 exposure records are fully verified.
Gross exposure (before mitigation)
$83,200.00
Mitigation benefit to date
$37,480.00
Remaining financial impact
$36,520.00
What Changed
2 parts replaced, comparing the current and proposed Bill of Materials.
Largest Financial Drivers
| Part | Supplier / PO | Net exposure |
|---|---|---|
| APX-8801B | Sunrise ElectronicsPO-3301 | $25,200.00 |
| APX-8801B | Sunrise ElectronicsPO-3301 | $25,200.00 |
| APX-8801B | Sunrise ElectronicsPO-3301 | $12,600.00 |
| APX-4415-1 | Harness WorksPO-3302 | $11,000.00 |
Supplier Concentration
| Supplier | Net exposure |
|---|---|
| Sunrise Electronics | $63,000.00 |
| Harness Works | $11,000.00 |
Financial Outcomes
| Part | Estimated (frozen) | Value avoided / preserved | Actual loss | Net benefit | Status |
|---|---|---|---|---|---|
| APX-8801B | $25,200.00 | $25,200.00 | $7,560.00 | $17,640.00 | Closed |
| APX-8801B | $25,200.00 | $0.00 | $25,200.00 | $0.00 | Closed |
| APX-8801B | $12,600.00 | $12,600.00 | $1,260.00 | $11,340.00 | Closed |
| APX-4415-1 | $11,000.00 | $11,000.00 | $2,500.00 | $8,500.00 | Closed |
Mitigation Actions
| Part | Action | Owner | Due | Status |
|---|---|---|---|---|
| APX-8801B | negotiate | nr-buyer (unverified) | 2026-08-03 | Done |
| APX-8801B | accept loss | nr-buyer (unverified) | 2026-08-03 | Done |
| APX-8801B | cancel | nr-buyer (unverified) | 2026-08-03 | Done |
| APX-4415-1 | redirect | nr-buyer (unverified) | 2026-08-03 | Done |
Key Decision History
The most consequential recorded activity for this engineering change. Repeated form submissions and correction steps are condensed here; the complete, append-only record remains available in Audit Trail.
| When | Actor | Action |
|---|---|---|
| 7/29/2026, 8:14:45 PM | James Whitfield | Closed all four mitigation outcomes: two PCBA cancellations, one accepted PCBA loss and one harness conversion. |
| 7/29/2026, 8:14:40 PM | James Whitfield | Approved alternate demand for 50 Rev-B PCBAs as field-service spares and 100 Rev-1 harnesses for the installed service fleet. |
| 7/29/2026, 5:12:05 PM | Elena Suárez | Calculated Week-0 baseline exposure against the imported open POs. |
| 7/29/2026, 5:12:03 PM | Elena Suárez | Generated and approved part-number mappings for the PCBA and harness. |
| 7/29/2026, 5:12:03 PM | Elena Suárez | Recorded supplier commitment terms for Sunrise Electronics and Harness Works. |
| 7/29/2026, 5:12:02 PM | Tasha Reyes | Imported open PO export (4 lines, 2 supplier(s)): PO-3301 (Sunrise Electronics, PCBA, 3 batches) and PO-3302 (Harness Works, harness). |
| 7/29/2026, 5:12:02 PM | Elena Suárez | Imported current and proposed BOM; explicitly paired the PCBA and harness replacements. |
| 7/29/2026, 5:12:00 PM | Elena Suárez | Created engineering change "ECO-1042: Main Compute PCBA Rev B → Rev C" for Nova Robotics, Inc. (fictional demonstration company). |
Provenance & Calculation Method
Each exposure record is classified Known, Estimated, or Unresolved based on whether its part mapping and PO currency data are fully confirmed. Unresolved records carry no dollar figure by design -- they are counted, never estimated at zero -- so they can never quietly understate real exposure. All calculations are deterministic: identical inputs always produce identical results, and every superseded calculation remains in this system’s history rather than being overwritten.
Appendix: BOM & Purchase Order Summary
replaced
2