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 Processing of Waves

Use

You can process waves and thereby control your warehouse activities.

Prerequisites

You have defined number ranges for waves. For more information, see the Implementation Guide (IMG) for Extended Warehouse Management (EWM) under Start of the navigation path Master Data Next navigation step Define Number Ranges. End of the navigation path

If you want EWM to save the logs for the wave, you have created an entry for the warehouse and the subobject WAVE (wave processing) as well an entry for the warehouse and the subobject WAVE_REL (wave release). For example, you can define that you want to see all messages in the application log with the status Additional Information . You have made these settings on the SAP Easy Access screen under Start of the navigation path Extended Warehouse Management Next navigation step Settings Next navigation step Activate Application Log. End of the navigation path

Features

You can process waves in the following ways:

  • Lock or unlock

    You can lock a wave with the status I (initial). As a result, the status of the wave becomes H (Locked). When you unlock a wave, EWM resets the status of the wave to I. You cannot release locked waves.

  • Merge

    You can merge as many waves as you want. The prerequisites are:

    • The waves have not yet been released, in other words, they have the status I (initial, wave is created) or H (hold, wave is locked).

    • All the waves have the same status, either I or H .

      EWM assigns warehouse request items to the waves. When you merge waves, EWM assigns all the warehouse request items for the selected waves to the first wave selected. EWM always uses the name of the top row. For example, you have waves 123, 456 and 789. If you select and merge these, EWM merges these 3 waves into wave 123.

  • Release

    Waves are used to create warehouse orders and warehouse tasks. They can be released in the following ways:

    • Automatically

      EWM creates a job that automatically releases waves on the release day and at the release time.

    • Immediately

      When you or EWM create a wave, EWM releases this wave immediately.

    • Manually

      You can manually release a wave at any point in time in the monitor or in wave processing.

      When you manually release waves, you can also release locked waves. In this case, EWM sets the status Locked for the warehouse orders created. As a result, these warehouse orders are locked for further processing for the time being.

      When you or EWM release a wave to generate warehouse tasks, EWM copies the staging area and the mode of the wave to warehouse task.

      You can release waves multiple times. For example, if you release a wave, but EWM can only generate some of the required warehouse tasks since there is not enough stock, you can release the wave again at a later point in time.

      You can display the log by using the Release Log button. To do so, on the SAP Easy Access screen, choose Start of the navigation path Extended Warehouse Management Next navigation step Work Scheduling Next navigation step Wave Management Next navigation step Maintain Waves. End of the navigation path

  • Subsystem

    You can release a wave for a downstream subsystem. As a result, EWM transfers the warehouse orders to the downstream subsystem.

  • Assign or remove assignment

    You can assign warehouse request items to a wave or remove the assignment. Here, the lock time for the wave must not have expired yet. Moreover, the wave must not have been released yet. If you have set the Wave Assignment Also Possible After Wave Release indicator as an attribute in the wave template, you can, however, assign an additional warehouse request item to waves that have already been released.

  • Split

    You can select a warehouse request item and remove it from the current wave. EWM creates a copy of the wave and assigns the warehouse request item to the copy.

  • Assign automatically

    EWM automatically assigns the chosen warehouse request items to waves. To do this, the system uses the same logic as for the automatic wave assignment .

  • Delete

    When EWM deletes a wave, it removes the assignment of all the warehouse request items to the wave. EWM deletes a wave completely, in other words, you can no longer archive it.

Activities

If you want to perform the activities described above, you work with either the monitor (transaction /SCWM/MON) or with wave processing. For wave processing, on the SAP Easy Access screen, choose Start of the navigation path Extended Warehouse Management Next navigation step Work Scheduling Next navigation step Wave Management Next navigation step /SCWM/WAVE –Maintain Waves. End of the navigation path