Crystal Methods are a family of software development methodologies developed by Alistair Cockburn from his study and interviews of teams. The methods are color-coded to signify the risk to human life. For example, projects that may involve risk to human life will use Crystal Sapphire while projects that do not have such risks will use Crystal Clear. Crystal focuses on six primary aspects: people, interaction, community, communication, skills, and talents. Process is considered secondary. There are also seven common properties in Crystal that indicate higher possibility of success and they include frequent delivery, reflective improvement, osmotic communication, and easy access to expert users. The methods are very flexible and avoid rigid processes because of its human-powered or people-centric focus. Alistair Cockburn is also one of the original signatories of the Agile Manifesto.
Crystal Clear: A Human-Powered Methodology for Small Teams: A Human-Powered Methodology for Small Teams (Agile Software Development Series)
by Alistair Cockburn