in the high thinktank process we are supposed to run 3 imagestreams for a each question so i was wondering what's the maximum or ideal length of a single image stream ?1,2or10 minutes???
Run them to their natural conclusion. I wouldn't see anything less than 3 minutes as a complete answer. The whole process for each would take me about 20 minutes including the debriefing. Since by the third Image Stream I'm usually getting a sense of the answer.