But if those imprecise answers can help to refine questions and methods, then each cycle can be a step in the direction of better action and research. In other words, there are times when the initial use of fuzzy methods to answer fuzzy questions is the only appropriate choice. Action research provides enough flexibility to allow fuzzy beginnings while progressing towards appropriate endings. To my mind, a cyclic process is important. It gives more chances to learn from experience provided that there is real reflection on the process and on the outcomes, intended and unintended.
Qualitative information is less constraining of the process.
Participation is a somewhat different issue, more to do with action than research. Action outcomes can usually be achieved only with some commitment from those most affected. One of the most important ways of securing that commitment is through involving those affected. There may well be other reasons, too. On some occasions the eventual interpretation of information is richer if involvement is greater.