Slotting Optimization SOP

Standard procedure for re-slotting warehouse SKUs by velocity and order affinity, building daily move plans, and executing forward-pick face changes without disrupting active picking.

Steps

• Review the slotting inputs
  The slotting analyst verifies that all SKU input data (item ID, quantity, velocity tier, current location, and order affinity) matches the WMS database within 2 minutes. If any record is missing or mismatched, escalate the discrepancy before building the move plan.
• Verify that active picking will not be disrupted
  The slotting analyst queries the WMS for active picks, waves, and replenishment tasks tied to the source location and confirms whether the move can proceed now. If the location is assigned to an open task, stop and defer the move before any physical change is made.
• Branch on pick activity status
  The slotting analyst routes the work based on the WMS status check. Send active locations to the defer path and idle locations to the move-plan path.
• Defer the move and escalate the conflict
  The slotting analyst records the conflict in the WMS or move log, notifies the supervisor or wave planner, and reschedules the move for a non-picking window. Include the affected location, SKU, and reason for deferral.
• Build the daily move plan
  The slotting analyst creates a prioritized move list using velocity, order affinity, travel reduction, and available labor. Assign each SKU a source location, destination location, and planned execution order before work begins.
• Validate the move plan against capacity and location rules
  The slotting analyst checks each planned destination against cube, weight, compatibility, and temperature limits before approval. Remove or revise any move that would exceed location capacity or violate site rules.
• Prepare the destination pick face
  The slotting analyst or warehouse associate confirms the destination location is empty or cleared, prints and applies the correct location label, and scans the bin to verify the destination is ready to receive the SKU.
• Move the SKU to the new location
  The warehouse associate uses the assigned pallet jack or cart to transfer the SKU to the destination location, keeping the item secure and preventing mix-ups during transport. Place the SKU in the approved face and confirm the physical count matches the move plan.
• Update the WMS location record
  The slotting analyst scans the SKU and destination label in the WMS, then closes or releases the old location as required. Confirm the system record reflects the new location before the task is marked complete.
• Verify the final slotting result
  The slotting analyst scans the SKU and destination location, compares the physical placement to the WMS record, and confirms no active pick task was interrupted. If any mismatch is found, stop and correct it before closing the move.
• Record exceptions and non-conformances
  The slotting analyst documents any mislabels, location conflicts, damaged goods, or system mismatches in the exception log and escalates them for correction. Include the SKU, location, issue type, and corrective action taken.