Wave planning

What is wave planning? 

Wave planning is the process of grouping orders into batches (waves) that release for picking at scheduled intervals throughout the day. This could be a predetermined time or could be triggered by order volume thresholds. 

As an example, imagine a freight truck is expected at 10 a.m. The orders scheduled to leave on this truck would constitute a wave and would all be picked and processed together. 

It is sometimes called wave picking or wave release.

The benefits of wave picking 

Wave planning prevents overwhelming the warehouse with several orders at once and ensures time-sensitive shipments are prioritized. 

 

How WMS handles wave planning

The warehouse management system (WMS) facilitates wave release by selecting a group of orders meeting specific criteria for simultaneous processing.  

The system evaluates factors including: 

  • Shipping carrier pickup schedules 

  • Order priorities 

  • Product locations 

  • Operational constraints 

  • Available labor  

The WMS calculates how long each wave will take to process and schedules releases working backwards from carrier pickup schedules. This prevents missed shipments while avoiding premature picking that would congest staging areas. 

Order grouping within waves may consider multiple attributes to maximize picking efficiency, such as combining orders shipping to similar regions or orders containing products from the same warehouse zones. Wave planning determines when a group of orders releases, how those orders then get picked is often handled by a complementary strategy like batch picking or cluster picking.

The WMS calculates expected labor requirements for each wave, ensuring no single release overwhelms capacity while keeping operatives productively engaged throughout shifts. This prevents idle time during slow periods and bottlenecks during volume spikes. 

How wave planning fits into supply chain execution

Wave planning is a scheduling decision, but it's really about matching warehouse output to a transportation deadline — the carrier pickup time the wave is built around. Getting that timing wrong doesn't just create a warehouse bottleneck, it means a truck leaves without its full load or a shipment misses its window. That tight coupling between warehouse timing and transportation timing is what supply chain execution means in practice.