Planning with Excel Integration 
Use
You can use Microsoft Excel as your interface to enter plan data in the SAP System. Microsoft Excel can be connected to your SAP System as an interface.
Prerequisites
The entry of plan data is based on the
planning layout. In order to complete planning using Excel as the creation screen, the following perquisites have to be met:
If you change a planning layout after creating an Excel template, you can no longer use this Excel template. In this case, you have to create a new Excel template.
Procedure
Preparations for planning with Excel integration
Enter the values for the variables defined in the planning layout. This entry is necessary so that the Excel sheet can be opened in the next step.
The system automatically assigns a file name. A connection between the plan task and the Excel spreadsheet is created by the file name, that is, a connection between the cells of the spreadsheet and the cells of the planning layout.

You can also enter a file name. To do so, you have to go to the column file name in the plan task when editing your plan task and enter your own file name.
The planning layout is displayed as an Excel spreadsheet. You can individually set up the spreadsheets. Various functions are available for this purpose. For more information see Functions for Editing Excel Templates.

The default parameters are only temporarily saved at this point. To assign the file name to the planning layout and to save the values for the variables, you have to save the planner profile.
Entering plan data with Excel as the entry screen
Once you have set up and activated the Excel integration for a planning layout, you can enter your plan data in the Excel entry screen.

You should not use the following functions:
If you use these functions, the data cannot be properly imported into the SAP System.
You can find additional information on creating plan data under
Creating Plan Data.