Load Planning & Consolidation
Load planning decides how individual orders get grouped and packed into physical loads — which pallets go on which truck, how many trucks a day's orders actually require, and whether combining several smaller shipments into one load makes financial sense. It's the step between "what needs to ship" and "how do we actually load the truck," and it's where a surprising amount of avoidable freight cost hides.
Shipping a half-empty truck costs nearly the same as shipping a full one — the driver, fuel, and mileage costs are largely fixed regardless of how much cargo is aboard. Consolidation combines multiple smaller shipments (that might otherwise each ship separately as small LTL loads) into a single, more fully-utilized load, spreading the fixed cost of the trip across more freight. A shipper moving several partial loads to the same region on the same day can often consolidate them into one or two trucks instead, cutting per-unit shipping cost substantially.
A load plan has to satisfy multiple physical limits simultaneously, not just one. Weight capacity is the obvious constraint, but cube (volume) capacity is often the binding one for lightweight, bulky goods — a truck can hit its volume limit long before it hits its weight limit. Stackability matters too: fragile or top-loaded items constrain what can go on top of them, and load sequence needs to account for delivery order (last stop's freight loaded first, so it's not blocked by earlier stops' freight). Getting this wrong doesn't just waste space — it risks product damage and forces re-handling at the dock.
When a single truck delivers to multiple stops, load planning and route planning become tightly linked. Freight for the last delivery stop should be loaded first (deepest in the trailer), and freight for the first stop loaded last (nearest the door) — otherwise the driver has to unload and reload other customers' freight just to reach what they need at each stop. Getting the loading sequence wrong is a common, avoidable cause of extended dwell time at each delivery.
Consolidation isn't free — it takes time to wait for enough orders to accumulate into an efficient load, and that wait time can conflict with delivery deadlines. Load planning logic typically enforces a cutoff: consolidate opportunistically, but never let consolidation delay a shipment past its promised delivery date. Time-sensitive or high-priority orders are usually flagged to bypass consolidation entirely and ship immediately, even at a higher per-unit cost.
Cross-docking takes consolidation a step further: freight arriving from multiple inbound trucks is sorted and reloaded directly onto outbound trucks with little or no storage in between. This works well for high-volume, predictable flows — retail replenishment networks are a classic example — and depends on tight coordination between inbound arrival times, dock scheduling, and outbound load plans. When it works, it removes a full storage-and-retrieval cycle from the process; when timing slips, it creates a pileup of freight with nowhere planned to go.