Maintaining Activities: Overview 
There are several ways of maintaining activities and their data in the Project System.
Activities in (Standard) Networks
In standard networks and networks you can maintain the data for the activities:
You can maintain the data of internally processed activities on two overviews:
You can maintain various data for activities on the detail screens: You can enter data for external processing on the detail screen of an internally processed activity. This is useful if at some point you can no longer perform the activity in-house and have to have it performed externally.
You can maintain all other activity data under the menus Activity, Details and Extras.
Activities in the Graphic
You can maintain activities in the network graphic, Gantt chart and in the
project planning board.Maintaining Activities and WBS Elements Together
You can edit WBS elements and activities at the same time, for example when you already know as you are setting up your project which WBS elements will be broken down in more detail with activities.
To do so, use
structure planning, if you want to work in list format, or the project planning board, if you want to work graphically.