Which of the following is NOT an interest into which each DSDM role is grouped?

Maintenance is not one of the interest groups into which each DSDM role is grouped1. The recognized interest groups are Business, Solution/Technical, and Management1. These groups represent the different areas of focus within a DSDM project.

In DSDM, each role is grouped into interests such as Business, Solution/Technical, and Management. Maintenance is not one of the interests into which DSDM roles are grouped. The primary focus of DSDM roles is to ensure that the project is delivered successfully by balancing business needs, technical feasibility, and effective management practices.

References:

DSDM Agile Project Framework Handbook

"Agile Project Management: Best Practices and Methodologies" by Eric Brechner