Doubt in a custom method in a custom BO

Hi All,

I have a doubt in one of the methods I am writing in a custom BO.In the meethod I have written certain select statements and after fetching some data and calculation I am also updating some custom tables too.

No what I am confused about is whether this method will work as i am basically writing ABAP in it. Also i have 3 export parameters but am not sure what will be their use as I am just updating saome tables in the method. So what exactly is the o/p? At the time of declaration i declared them with a view that I might use the output of the method but am not sure now?

Please guide me on my approach.

Thanks in advance,

Saket.