SCM asks "when, where, and with what inventory strategy goods should exist"; TMS asks "how to move goods at acceptable cost and time." Plan-only orders plus dispatch-only trucks without constraint feedback yields: perfect plans that cannot load, booked capacity without goods ready, in-transit exceptions that cannot replan supply.
1. Responsibility Comparison
| Dimension | SCM | TMS | Coordination |
|---|---|---|---|
| Decision focus | Replenishment, allocation, safety stock | Routes, capacity, cost, SLA | Ship waves vs carrier capacity |
| Constraints in | Forecast, capacity, supplier lead | Vehicle type, road, nodes, SLA | Capacity calendar back to plan |
| Outputs | Buy/transfer/production advice | Waybills, dispatch, tracking | Unified ASN and POD return |
| Optimize for | Service level and inventory cost | Transport cost and OTIF | Total logistics cost |
2. Key Data Flows
Minimum closed loop:
- SCM outputs ship demand (SKU, qty, origin, dest, required arrival).
- TMS feasibility check returns commit date and cost band.
- On confirm, generate waybill; warehouse picks by wave.
- In-transit events (delay, damage, reject) back to SCM/order for replan or CS playbook.
- POD and receipt drive freight AP and customer fulfillment score.
Without step 2 feedback, SCM ATP is inventory illusion.
3. Scenario Practice
3.1 National DC Replenishment
SCM decides which DC and how much; TMS chooses LTL/FTL/express mix—joint optimize inventory holding + transport, not warehousing KPI alone driving frequent small high-freight moves.
3.2 E-Commerce Peaks
After presale lock, pre-book linehaul and last-mile capacity. TMS saturation should be an SCM volume switch.
3.3 Export Leg
Domestic TMS to international forwarder—slot and cut-off in planning calendar or factory rush misses sailing.
4. Integration and Organization
Technically API/EDI for orders, inventory, waybills, tracking; organizationally joint planning-logistics meetings with shared SLA. KPIs: stockout rate, transport OTIF, logistics cost per order, exception close time.
5. Closing
SCM-TMS coordination means plans hear capacity; capacity sees plans. XYN Technology emphasizes closing "commit date" loop before smart routing. Real constraints make algorithms useful.
6. Carrier Collaboration and Exception Playbooks
Build carrier scorecards: OTIF, damage rate, cost per shipment, exception response—not lowest bid alone. One FMCG firm shared weekly sales forecast with strategic carriers for capacity guarantee in peak season.
Standard playbooks: delay notify SLA, reroute rules, customer comms templates, claim evidence (photos, POD, temp log). Cold chain, hazmat, oversized need separate constraints—not shared with general freight rules.
6.1 Warehouse-Transport Unified Dispatch
Multi-leg orders need segment handoff ownership in TMS. Presale/peaks: lock capacity and storage; TMS saturation as SCM volume switch. Carbon and ESG: export mileage, load factor, empty return baselines.
7. Cross-Border Multi-DC Network
Overseas DCs: SCM models tariff, lead time, mode total cost; TMS returns customs and dwell exceptions for safety stock adjustment. Global master data, local compliance params.
Freight cost to order line: allocation rules, return, redelivery—or margin analysis wrong.
8. Green Logistics Metrics
Customers ask for carbon and load factor data. SCM/TMS should estimate transport carbon per order by route, vehicle, season—for green procurement bids, not ad-hoc estimates.
Backhaul and co-loading optimize empty miles, not only lowest freight per leg.
Cross-border status and ETA back to SCM for promo and safety stock rhythm.
Layered safety stock: central DC supply, forward DC speed, plant DC continuity—simulate total cost before thresholds. Reverse logistics in closed loop too. Annual DC network review using TMS trajectory data.