More broadly, the public organization’s political environment reaches into the organization’s inner workings that severely curtail corporate - style strategic planning. The “pervasive vagueness” of agency missions; environmental constraints in the form of interest group, media, and other forces that render “bold moves” by public sector executives “almost completely impossible”; the uniquely omnipresent need to not just what it will do; arbitrary time constraints, such as budget and election cycles, that can rush or delay strategic decisions in ways that render them no longer strategic; and coalitions that are usually prone to disintegrate prior to the complete implementation of a strategic plan - all these and more limit the use of strategic planning in the public sector.72 One study of city managers and mayors concluded the single greatest obstacle to successful strategic planning in these municipalities was the “need to gain greater control over the external political environment.”73