Abstract
This chapter explores the nature of complexity that arises in high value contracts between large organisations. To develop a framework, a detailed case study was undertaken to identify the factors that create complexity. The case studied was the availability contract to provide depth maintenance and upgrade on Tornado aircraft between BAE Systems and the MOD. The contract, named ATTAC, is worth similar to 1.3bn pound and the MOD engaged with BAE Systems precisely to enable them to more cost effectively manage the complex enterprise of over 22 organisations or business units that deliver this service. The work explores the operation from a range of perspectives, interviewing managers from across the organisations involved. The factors contributing to complexity are described in context and a framework is presented which clusters them into six key areas. It is proposed that this framework may then be used as a tool for analysis and management of complexity.