Hi,<br><br>I&#39;m working on expert system, automating one of the stages of optical design.<br>Now, we&#39;re testing the system and we need a function, eхplaining a decision of the system: which rules has been fired, why they has been fired and so on. And I&#39;m looking for a way to implement this feature.<br>

<br>Has someone had an experience in implementing this kind of features? Or does someone know how it can be implemented?<br><br>Thank you,<br><br>Maxim Kolchin<br>Laboratory of Intellectual Systems,<br>National Research University ITMO,<br>

<a href="http://en.ifmo.ru">http://en.ifmo.ru</a><br>