If your 'TMS' is an Excel with seventeen tabs, or your carrier lives in GM Transport while you chase status on WhatsApp, this piece is for you.
We are not here to mock the sheet: we are here to name when it stops scaling.
Same axis as the computer use pillar: register vs execute.
- Excel records what someone pastes.
- GM Transport records the fleet.
- Neither calls the carrier, opens the mirror account, or matches CFDI to POD alone.
Empathy first: Excel is not stupidity
Excel wins early because it is cheap, flexible, and everyone can use it. At 40 shipments/month with three trusted carriers it can work.
The break appears when volume, exceptions, and SAT (Carta Porte 3.1) demand evidence, not cells.
Related: from 47 Excels to 1 dashboard (centralization) vs this article (when the sheet is your freight TMS).
GM Transport: strong on fleet, not freight buy
GM Transport is a useful Mexican TMS for motor carriers running units, settlements, and fleet ops. If you are a shipper or 3PL buying freight from dozens of carriers, GM is not your tower: it is their system.
OCL does not run shop or fuel. It governs assignment, multi-carrier visibility, POD, and audit on the side that pays freight.
Where the sheet breaks (and register-only TMS)
| Need | Excel / manual register | With agents (computer use) |
|---|---|---|
| Assignment | Calls and chats; 'assigned' cell | Voice/WhatsApp + automatic record |
| GPS | Ping pasted by hand or nothing | Mirror account; <10 min alert |
| POD | Photo in the group chat | File tied to the trip |
| Audit | Month-end sampling | CFDI + Carta Porte + GPS + POD before pay |
| Carta Porte 3.1 | Sporadic analyst review | Verification in the match (not a PAC) |
Signals you already outgrew it
Elige un paso para ver el detalle
Detalle del paso · 01
Two truths for the trip
Signal 1
Exit without drama: 3 layers
Baseline
Measure capture hours, % invoices audited, and MXN in dispute.
One flow
One lane (e.g. Bajío–Laredo) or one customer; tracking + audit agents.
Decision
At 6-8 weeks: scale, tune rules, or keep hybrid.
Weekly detail: 6-8 week playbook.
Related reading
- Pillar: computer use
- CargoWise
- Magaya
- Hub: best TMS
Key takeaways5 points
- Excel is Mexico's most used TMS for flexibility, not for execution power.
- GM Transport solves fleet admin; the shipper's pain is different.
- The sheet fails on alerts, evidence, multi-carrier, and 100% audit.
- Recommended exit: coexist and automate execution with computer use, not a big bang.
- At 300+ shipments/month, a 6-8 week pilot is the measurable path.
Frequently asked questions
Operationally, yes: many Mexican towers run shipments in shared sheets. Technically it is a fragile system of record: no native alerts, no geofence, no 100% audit, weak defensibility.
Rarely head-on. GM Transport is a Mexican TMS for carrier fleets. OCL is for shippers/3PLs buying third-party freight. They can coexist: carrier on GM; you on agents.
When volume (especially 300+ shipments/month), carrier count, or sample audit already punish OTIF and margin. Before that, Excel can work with brutal discipline.
No. A 6-8 week pilot on one flow (one lane or customer). See stop capturing playbook.
Execution with computer use: assignment, GPS mirrors, POD, and CFDI/Carta Porte/GPS/POD audit. Typical 5-7% spend recovery.
If your tower is a shared Excel and you already move hundreds of shipments per month, measure agents in a 6-8 week pilot.
See agents on real shipments