So, you have a technical problem?
Think hard about that problem, until it reduces to a plain technical contradiction. In such a contradiction, there will be a desired effect and an undesired side-effect. These effects should be loosely matched to the entries in the following list of paramaters.
It is not in the style of TRIZ to make a trade-off between the contradicting parameters, but rather to bypass the problem. Since patent research has shown that many problem solutions are similar, the entered contradiction will be answered by results to similar problems that you can translate back to your problem as a source of inspiration.