I have to test an UI application which does not have specific sequences of Path through it.

What it means the Interaction Designer has given a lot of flexibility for the users to move through diferrent areas of the application in getting their Business Rules established. The product has not been designed based on Use Cases.

Can any one provide me suggestions as to how I can create my tests for such an application. How do I ensure that during testing, I have covered all the scenarios that a user might walk through.

Thank You.