The document discusses best practices for developing testing programs that incorporate design and development principles. It emphasizes the need to provide validity evidence to support claims about items and consider accessibility during authoring given technical advances. Frameworks like CTB's CADDS (Content Alignment Design and Development System) can help by documenting steps to maintain focus on evidence and support interpretations. CADDS details information on content, item types, specifications, and guides development through field testing and implementation. Rigorous specifications and clear direction for writers are important to distinguish item attributes and refine development plans.