The model shows the refrigerated distribution center of Lala Norte located in Vallejo, Mexico City. The new layout is designed to maximize the productivity of box sorting and piece sorting into plastic totes for greater control and productivity.

1. Operators carry out the sorting of corrugated materials using a voice picking system, z-pick in narrow aisles, and direct rack picking. High-movement products are sorted from pushback racks, while slow-moving products are sorted from selective racks.
2. The sorting of fractional boxes is performed in a three-level sorting tower, facilitated by a central conveyor belt. Each order starts with one or more empty plastic totes on the 3rd level and moves through the sorting zones using a pick-n-pass process. Optimal balancing of these zones is crucial.