• 21    Introduction
• 21.1    Purpose
• 21.2    Tasks
• 21.3    Defining tasks
• 21.4    How work grows and changes
• 21.5    Managing artifacts
• 21.6    Uncertainty and choosing tasks
• 22    Development methodologies
• 22.1    Purpose
• 22.2    Characteristics
• 22.3    Commonly-discussed methodologies
• 22.4    Practical considerations
• 23    Life cycle patterns
• 23.1    Introduction
• 23.2    Life cycle and development methodology
• 23.3    Key ideas
• 23.4    Purpose of life cycle patterns
• 23.5    A model for patterns
• 23.6    Documenting life cycle patterns
• 23.7    Work steps and artifacts
• 23.8    Life cycle and teams
• 23.9    Life cycle and planning
• 23.10    Principles for a life cycle pattern
• 24    Example life cycle patterns
• 24.1    Introduction
• 24.2    Whole project life cycle
• 24.3    System development patterns
• 24.4    Post-development patterns
• 24.5    Detail patterns
• 24.6    Comparisons and lessons learned

What life cycles and development methodologies are. It covers what goes into a life cycle pattern and how the patterns relate to other parts of how a project operates. It defines development methodologies and how these relate to life cycles. The last chapter lists several example life cycle patterns, which lead into a comprehensive reference life cycle in Part VI.