The HOAI regulates what are known as service phases. They describe the individual service profiles within the construction planning.
The service profiles are divided into nine parts and are described as follows:
- Basic Analysis
- Concept Design
- Design
- Architectural Design
- Final Planning
- Preparation of Contract Awarding
- Participation in Awarding Contract
- Construction Supervision
- Construction Management & Documentation
For area planning (land-use planning and landscape planning), the service phases are designed specifically according to the respective requirements.