Configuring Date Grid Window for Data Variance calculation

Hi all,

From the help file:

http://help.sap.com/saphelp_nw2004s/helpdata/en/3e/812f387ef4311ce10000009b38f889/content.htm

Here do we have to set the window 1-5 in the R/3 system???

It says that it can be done with the help of LIS ?

But I didnt find any place where this 4 windows can be specified...?

Any inputs will be appreciated.

- Amit