Forget about the lifecycle, if the foundation of the ITIL V3 was the 5 lifecycles:

• Service Strategy SS
• Service Design SD
• Service Transition ST
• Service Operation SO
• Continual Service Improvement CSI

In ITIL 4, we have to think about dimensions, the 4 dimensions:

• Organizations and People
• Information and Technology
• Partners and Suppliers
• Value Streams and Processes

Those dimensions are linked strongly with the ITIL SVS (Service Value System) which is composed of 5 core components:

• Guiding Principles
• Governance
• Service Value Chain
• Practices
• Continual Improvement

Which in return have a strong relationship with the 3 main practices (general management practice, service management practice and technical management practice). If in ITIL V3 we said incident management process, now in ITIL 4 we will say incident management practice. There are in total 34 practices (14 general management practices, 17 service management practices and 3 technical management practices).

The 14 general management practices are (more details here):

• Architecture management
• Continual improvement
• Information security management
• Knowledge management
• Measurement and reporting
• Organizational change management
• Portfolio management
• Project management
• Relationship management
• Risk management
• Service financial management
• Strategy management
• Supplier management
• Workforce and talent management

17 service management practices are (more details here):

• Availability management
• Business analysis
• Capacity and performance management
• Change control
• Incident management
• IT asset management
• Monitoring and event management
• Problem management
• Release management
• Service catalogue management
• Service configuration management
• Service continuity management
• Service design
• Service desk
• Service level management
• Service request management
• Service validation and testing

3 technical management practices are (more details here):

• Deployment management
• Infrastructure and platform management
• Software development and management

Here a quick resume of the ITIL 4: