Wave picking is used to support management and workers via a warehouse management system (WMS) in several ways, to support the planning and organizing of the daily flow of work of a warehouse or distribution center. Wave picking is an application of short-interval-scheduling. Managers, using a WMS, may assign groups of orders into short intervals called "waves", to initially simulate the flow for the day, consistent with the order departure plan and available labor. When the plan is satisfactory, it is accepted. The WMS will then release the waves to the warehouse sequentially throughout the day, to allow managers to coordinate the several parallel and sequential activities required to complete the daily work plan. One of the objectives of wave picking is to minimize the variation of workl