Conflict between public and private partners may be inevitable (Edwards et al 2004, p.55), arising from disagreements over timeframes, costs and quality issues (Leung et al 2004). Other factors can include: project priorities (Hope 2012); manpower resources (e.g. a lack of skills to deliver services to agreed standards); and personality conflicts (e.g. personal or professional differences between individuals and which are primarily task-driven or people-focused). Conflicting interpretation of contract requirements may occur, due to individual or organisational biases or preferences (Cambridge Economic Policy Associates 2005, pp.34-35). Any of these conflicts can be exacerbated by the long-term operational nature of PPPs, and long-standing conflicts tend to resist successful resolution.