Summative evaluation is used to evaluate the effectiveness of instructional programs and student learning. It has two phases - an expert judgement phase and a field trial phase. The expert judgement phase involves subject matter experts analyzing the content, design, feasibility, and current use of instructional materials to determine if they have the potential to meet learning objectives. The field trial phase tests the materials on target learners in real-world settings to assess the impact on learning, job performance, and the organization. The purpose of summative evaluation is to determine if students or organizations achieved intended learning outcomes from the instruction.