At this phase, evaluators administer criterion-referenced tests based on the product's instructional objectives. If learners attain the objectives, then the instructional design was successful.
Summative evaluators are also interested in user satisfaction and in unintended outcomes.
Unintended outcomes may be either positive or negative. On the positive side, students might, for example, improve their class attendance, develop a continuing interest in the topic, or continue to use the materials after the assignment has ended. Negative unintended outcomes might include classroom management problems or a dislike for the subject matter. Instructional development ends with the summative evaluation. The product goes into use, and lessons learned are applied to new instructional materials.