A unit-load warehouse with multiple pickup and deposit points and non-traditional aisles

We show how to configure a cross aisle in a unit-load warehouse to facilitate travel between storage locations and multiple pickup and deposit points on one side. We use our models to investigate designs having two types of cross aisles—those that form a “Flying-V” and those that form an “Inverted-V.” Our numerical results suggest that there is a benefit to using a Flying-V aisle design, but the benefit is more modest than in the case of a single P&D point. Thus, to the extent practicable, pickup and deposit points should be concentrated toward the middle of the warehouse.

► We model aisles in a unit-load warehouse having multiple pickup and deposit points. ► The Flying-V design offers average travel distances 3–6 percent lower than traditional designs. ► The doors used most often should be near the center, thus concentrating material flows.