Why walking is your silent bottleneck
For many South African distribution centres — from a Durban import hub to a Johannesburg e-commerce fulfilment centre — the time operators spend walking between picks is the single biggest drain on throughput. Reducing travel time translates directly into higher picks per hour, lower labour cost per order and faster turnaround to customers.
Ten practical layout optimisations that deliver ~25% gains
These changes are pragmatic and finance-friendly: some are low-cost process tweaks, others require modest capital investment with rapid payback. Use a simple baseline pick-rate metric before you start so you can measure gains.
1. Slot by velocity and size
Place A-items (fast-moving SKUs) nearest packing stations and at knee-to-shoulder height to reduce reach time. For mixed-case picking common in Gauteng e-fulfilment, group similar sizes to speed handling and reduce errors.
2. Create true pick zones
Divide the floor into dedicated picking zones (fast, medium, slow). Assign pickers to zones using zone or batch picking. This reduces traffic and unnecessary cross-aisle walking.
3. Design efficient pick paths
Map typical orders and optimise routes to minimise backtracking. Implement a serpentine or S-shaped path within aisles rather than ad-hoc routing. Even small path tweaks can cut travel time substantially.
4. Adopt batch and wave picking
Group multiple orders into one picking run when SKUs overlap. Use wave schedules aligned with carrier collections (e.g., same-day couriers or interprovincial loads) to reduce duplicate trips.
5. Use narrow-aisle racking where throughput demands it
Narrow-aisle systems increase storage density and shorten aisle travel. In centres with high SKU turnover, the extra racks often pay for themselves in reduced walking and higher slot efficiency.
6. Implement pick-face rationalisation
Increase the number of units available at the pick face for high-volume items so pickers spend less time restocking. In South Africa’s seasonal peaks (Black Friday, December), adjust pick-face allocations in advance.
7. Shorten the distance to pack and despatch
Locate packing benches and despatch docks close to the highest concentration of picking activity. When possible, create multiple pack stations near different zones to avoid convergence delays.
8. Add simple conveyor or tote systems for busy lanes
Low-complexity conveyor loops or powered roller lanes can move totes from deep pick zones to central packing — reducing manual carry and speeding flow without a major automation project.
9. Integrate WMS rules for slotting and pick sequencing
Use your warehouse management system to enforce slotting logic, direct pick paths and produce optimal pick lists. Even basic WMS rules reduce human routing errors and improve consistency.
10. Test pick-to-light or zone lights for high-density SKUs
Pick-to-light and zone-light systems speed order selection in high-velocity areas. For smaller South African operations, targeted deployment on a subset of SKUs often yields the best ROI.
Practical next steps for South African operators
- Run a walking audit: time 10 representative orders and map steps per pick to identify hotspots.
- Prioritise low-cost wins: slotting, pick-path rework and batching usually show the fastest returns.
- Pilot before roll-out: trial narrow aisles, conveyors or pick-to-light in one zone to measure lift before a full investment.
- Engage local vendors: partner with South African racking and automation suppliers who understand port timings (Durban, Cape Town) and domestic distribution rhythms.
Measuring success
Track KPIs such as picks per hour, orders per shift, walk distance per pick, and order accuracy. A combined 20–30% throughput uplift is realistic when you combine slotting, pick-path optimisation and batching — and that aligns with actual gains seen across regional centres.
Conclusion
Optimising layout is a cost-effective way for South African warehouses to boost throughput without doubling staff. Start with a walking audit, apply the most relevant of the ten optimisations above, and measure results. Small, deliberate changes to layout and process will cut walking, speed picking and improve your bottom line.