> You can be entering a bunch of convulted rules into a GUI based system or you can be writing them in code.
There are more options than just these two. The best way is to write your rules in a nice, readable, dense DSL, designed specifically for that domain experts who know the rules but are afraid of code. And such a DSL can be very much free form and forgiving, helping a lot along the way, so the experts won't need much assistance.
With such an approach, developers (i.e., those who are not afraid of code) are either not needed or only concerned with maintaining this DSL, while the experts can code their rules directly. It eliminates unnecessary elements of a chain, and cuts costs quite significantly.
There are more options than just these two. The best way is to write your rules in a nice, readable, dense DSL, designed specifically for that domain experts who know the rules but are afraid of code. And such a DSL can be very much free form and forgiving, helping a lot along the way, so the experts won't need much assistance.
With such an approach, developers (i.e., those who are not afraid of code) are either not needed or only concerned with maintaining this DSL, while the experts can code their rules directly. It eliminates unnecessary elements of a chain, and cuts costs quite significantly.