Chapters 1, 2, 3, 4, 5 and 8 of Strategic Planning for Public and Nonprofit Organizations: A Guide to Strengthening and Sustaining Organizational Achievement by John M. Bryson, deal with the decision to plan as well as identifying organizational mandates. Although the author does not deal with vision until chapter 8, it seems useful to me to consider this issue early on and to revise the mission as the organization plans and implements its plans