The document discusses how Disciplined Agile (DA) could have helped avoid the failure of an airline's ERP project. It describes the case study where an airline wanted to develop a new web-based ERP system but the project failed because key integration requirements were missed. DA is presented as a framework that addresses people, principles, workflows and practices to help ensure all requirements are understood and delivered. The rest of the document illustrates DA concepts through automotive and scaling case studies and compares DA to other agile methods.