Siebel Need Analyses searching algorithm and criteria types

Hello Siebel experts!

We need to implement possibility to search applicable products based on input criteria from GUI.

As a solution Need Analyses has been chosen.

So far we have done:

- Created SmartScript scenario and questions with answers;

- Configured Product Scores. Bookshelf v8.1/8.2: Setting Up Product Scores

- We are able to search for exact values;

But the requirement is to search product not only by static values, but for example by price interval.

Perhaps client has 20000$ and he wants to buy specific product for this price. Expected result should be list of products which have price less or equal to 20000$.