Certified Disciplined Agilist
Disciplined agile delivery (DAD) is a process decision framework that enables simplified process decisions around incremental and iterative solution delivery. DAD builds on the many practices espoused by advocates of agile software development, including Scrum, agile modeling, lean software development, and others.

Rainer Volk has successfully passed the certification which allows him to support the existing and future customers to gain from this knowledge.
Certified Disciplined Agilist