The document discusses the implementation phase of instructional design, which involves pilot testing a course with learners to identify issues, revising the content based on feedback, preparing instructors and students for the course launch, and ensuring smooth delivery of the final product. Some issues to check for in the pilot test include measuring time on tasks, learner engagement, difficulty levels, understanding of instructions, and achievement of learning objectives. The implementation phase is when the instructional design is put into practice and any necessary adjustments are made before full rollout.