Picking
The process of collecting the products that make up an order from their warehouse locations. It consumes most of the operating time, and most of that goes into walking.
Picking is the process of collecting the products that make up an order from their locations inside the warehouse.
It is the single most time-consuming activity in a warehouse operation, and the uncomfortable detail is that most of that time is not spent taking product: it is spent walking.
The four strategies
| Strategy | How it works | When it fits |
|---|---|---|
| Pick to order | One operator prepares a complete order | Large orders with few SKUs |
| Batch picking | One operator picks for several orders on one route | Many small orders with repeating SKUs |
| Wave picking | Orders grouped into waves by priority or schedule | Operations tied to dispatch windows |
| Zone picking | Each operator covers a zone; consolidation at the end | Large warehouses or differentiated zones |
How it is measured
Lines per hour per operator measures direct productivity. Distance walked per unit picked is the diagnostic indicator: if it rises while lines per hour fall, the problem is not the people — it is the layout or the strategy.
Why it needs a system
Pick to order can be run on paper. Batch, wave and zone involve grouping, sequencing and consolidating — that is WMS work, and it also validates by scanning so the travel reduction is not paid for in errors.
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