In this chapter, a general methodological overview and discussion is given as backgmund to the more technical chapters to follow. In reading this chapter, the knowledgeable reader will discover that certain important methods are omitted or just mentioned briefly while other methods, especially those that are oriented toward presenting classifications, are treated at greater length. This, of course, reflects our own agenda and the demand to keep this introductory book short. It should not be regarded as passing judgment on these omitted methods; a number of which can also be quite useful within our person-oriented framework.