| A | Schedule Increase, Forecast Change or Special Car Order |
| B | Engineering Change or Late Release |
| C | Specification (Schedule) Error/Overbuilding |
| D | Shipment Tracing Delay |
| E | Plant Inventory Loss |
| F | Building Ahead of Schedule |
| G | Vendor Behind Schedule |
| H | Failed to Include In Last Shipment or Unauthorized Premium |
| I | Carrier Loss Claim |
| J | Transportation Failure |
| K | Insufficient Weight For Carload |
| L | Reject or Discrepancy |
| M | Transportation Delay |
| N | Lack of Railcar or Railroad Equipment |
| P | Releasing Error |
| R | Record Error or Late Reported Discrepancy Report |
| T | Common or Peculiar Part Schedule Increase |
| U | Alternate Supplier Shipping for Responsible Supplier |
| V | Direct Schedule or Locally Controlled |
| W | Purchasing Waiver Approval |
| X | Authorization Code to be Determined |
| Y | Pilot Material, Samples or Pre-Production |
| ZZ | Mutually Defined |