use of Parameter 'MaxSalesGen' and how it got populated.

Hi All,

Could you please let me know the exact use of the parameter (in some simple terms as i have gone through Implementation guide and was not able to relate with business).

Q1) Is this parameter automatically populated?

Q2) Is manual changing is allowed. If yes for both Q1 & Q2 then how will it deal with automatic update.

Q3)  We load history through custom program for a range of 'Sysdate' to 'Sysdate - 728 days'.

So, in that case what is the use of this parameter.

Also please explain what 2-sep-2013 signifies in our case(Shown in snapshot).

Thank you!!