This document discusses summative evaluation, which is used to make decisions about continuing the use of instructional materials. It describes the expert judgement and field trial phases of summative evaluation. The expert judgement phase involves analyzing the materials' congruence with organizational needs, content accuracy, instructional design, and feasibility of implementation. The field trial phase tests the materials' effectiveness with target learners and collects data on learner outcomes, instructor attitudes, and cost management. Summative evaluation aims to verify materials' effectiveness and impacts on learners, jobs, and the organization to determine whether the materials should be adopted or maintained.