In this chapter, we have presented several of the major system-wide approaches to Several of these models present contradictory approaches to change, and perhaps emphasize that there is no one best way for all organizations to manage change. Among the more popular approaches are TQM, reengineering, OD and survey feedback; make the research evidence supporting any one approach or model makes it difficult to change meaningful comparisons. It is clear that our knowledge of system-wide approaches to these and systems is incomplete. Our purpose here is to make you aware of new approaches and models. Given certain situation or set of conditions, you may decide that one approach may be more effective than others for that particular application.