Professional Scrum Developers are members of the Scrum Development Team and demonstrate knowledge and understanding of Scrum and their ability to build software using Scrum in real-world situations. The value of certification is intimately tied to the demonstration of knowledge needed to achieve it. By that measure, the PSD assessment is significantly more valuable than available alternatives for Scrum. And, we strive to ensure that they remain valuable and relevant through frequent inspection and adaptation of the assessment content.