1. Define the operating envelope
Document average and peak flow, parcel dimensions, weights, packaging stability, barcode quality, destinations, recirculation and growth assumptions. Averages hide the conditions that usually break a design.
2. Find the dominant constraint
A high destination count points to a different architecture than a small building, an irregular parcel mix or a phased investment plan. Name the constraint before naming a technology.
3. Design the complete flow
The sorter cannot compensate for poor induction, unreliable identification or blocked discharge lanes. Review every transfer from inbound receiving to the downstream destination.
4. Compare serviceability
Ask who will respond, which parts are held locally, what can be diagnosed remotely and which maintenance tasks require specialist access.