Batch picking is a warehouse order fulfillment method that groups several customer orders into one picking trip. Instead of walking the same aisles again and again for separate orders, a worker or autonomous cart collects items for multiple orders at once. This matters because travel time is often the largest part of warehouse labor cost.
A good batch picking system can increase throughput, reduce walking distance, and help orders ship faster.
Key Facts
- Total pick time = travel time + search time + handling time + sorting time
- Travel savings = separate route distance - batch route distance
- Picking rate = total order lines picked / total picking time
- Batch size = number of orders grouped into one picking trip
- Cart capacity constraint: total batch volume <= cart volume and total batch weight <= cart weight limit
- Best batches group orders with nearby item locations, similar deadlines, and compatible item sizes
Vocabulary
- Batch picking
- Batch picking is the process of collecting items for multiple customer orders during one optimized trip through the warehouse.
- Order line
- An order line is one requested product and quantity within a customer order.
- Pick path
- A pick path is the route a worker or robot follows through storage locations to collect required items.
- Sortation
- Sortation is the step where picked items are separated into the correct customer orders after or during picking.
- Warehouse management system
- A warehouse management system is software that tracks inventory, assigns tasks, and helps optimize picking routes and order fulfillment.
Common Mistakes to Avoid
- Batching too many orders together, which is wrong because cart capacity, sorting time, and error risk can cancel the travel savings.
- Ignoring item locations, which is wrong because batch picking only saves time when the combined route avoids repeated travel through the same aisles.
- Mixing urgent and nonurgent orders without priority rules, which is wrong because late shipments can occur even if the picker works efficiently.
- Skipping barcode scans or bin labels, which is wrong because collecting items for several orders at once increases the chance of placing an item in the wrong order bin.
Practice Questions
- 1 A picker handles 5 separate orders that each require a 120 m walking route. A batch route for all 5 orders is 260 m. How many meters of walking are saved by batch picking?
- 2 A worker spends 18 minutes traveling, 10 minutes picking items, and 7 minutes sorting a batch of 14 order lines. What is the picking rate in order lines per minute?
- 3 A warehouse has small orders with many overlapping aisle locations, but it also sells fragile items that must not be mixed in crowded bins. Explain one batching rule that would improve efficiency while reducing damage and sorting errors.