01The stages of a sortation system
Sortation failures are usually stage failures — parcels arrive at the sorter touching, or unidentified, or with nowhere engineered to go. A system design treats the stages as one problem:
- Induction and singulation. Bulk-fed parcels are spread and spaced by a singulator (with a stack separator ahead of it where parcels arrive overlapped) so every downstream stage sees one parcel at a time.
- Identification. Barcode reading — top-mounted or six-sided in a scanning tunnel — gives each parcel its identity and destination.
- Measurement (where billing matters). A dynamic DWS section captures dimensions and weight in the same pass, so sorting data and billing data are the same record.
- Diverting. The sorter — cross-belt, wheel or narrow belt — executes the routing decision at its chutes.
- Outfeed. Chutes, take-away conveyors and loading equipment clear sorted parcels at the rate the sorter produces them.
02Sizing a system honestly
A sortation system is sized on peak, not average: the busiest hour of the busiest week, with the real parcel mix — including the soft, oversize and badly labelled tail that brochures leave out. Destination count and growth come next, because frame layout is the expensive thing to change later. Controls and induction points can grow more gracefully than steel.
That is also why Goodscan quotes systems from a parcel profile and a building plan rather than from a rate table. Two halls with the same daily volume can need different frames — one long and narrow, one compact with a loop — and the honest answer only exists after the layout work.
A final sizing note: sortation stages interact. A faster sorter behind a weak singulator produces faster exceptions, not more sorted parcels. System quotations therefore always cover the stage sequence as a whole — induction, identification, measurement, diverting, outfeed — even when the purchase is phased stage by stage.
03Sortation inside the bigger line
Most sortation systems sit inside a measured warehouse flow: receiving and dimensioning upstream, sortation in the middle, loading downstream. The dimensioning system page covers the measuring half of that flow, the logistics sorting application page walks through a hub scenario end to end, and the parcel sorter page compares the diverting machines themselves.