Field help (CCMPLNAIDD) 

Use this field to define the task or action that must be performed on all transactions to successfully deliver the required design or production 'change'. As the default task your selected action will be applied to all lines on this plan.

For example, you might select the action 'Disassemble' if the selected entity is 'Work orders' and this task is a prerequisite for a replacement component.

The list of actions is defined in Local menu 2032.

 To assign a default to all transaction lines in this plan: