>>Maybe this is too easy but at the end of the exspression you can say:
>>
>>Whatever >= (Cutoff -+*/ somenumber)
>
>I'm not sure, I understood. Anyway, I spoke with my manager and he explained what he was talking not about reports (which would be really hard to change), but about some program, which I use to generate a file, which then processed by our Production department. So, my task becomes much easier (I hope). I haven't checked it yet, though.

Well anyway, what I meant to say was you can just add a calculation to the when expression of the report instead of hard coding it in the app. If cutoff needs to be changed by adding, subtracting, dividing or multiplying by some known value. (I sure you know that already)