• an uncontrolled development process
  where requirements are not defined, there is no design and code is produced quickly but the resulting system is unreliable or unmaintainable

or

• a heavy-duty rigid development process
  where all requirements are closely specified, there is a detailed formal design, which then takes a long time before any code is produced, is costly, and the end product often isn't what was required

• Frequent delivery of working code
• Iterative and incremental development
• Continuous testing
• Strong configuration management
• Collaborative and co-operative working with all stakeholders
• The development team is empowered to make decisions
• Accepting that change will happen