This workbook has been prepared for participants in the seminar, "Economic Evaluation of Building Design, Construction, Operation and Maintenance." It has two main functions: (1) to provide basic resource materials, references, and introductions to methods employed in the seminar; and (2) to provide instructional problems for solution by the participants. Specifically, it contains brief discussions of key elements in performing economic evaluations: discounting, escalation, establishing a study period, project selection techniques, and treatment of uncertainty; explanations of supporting analysis techniques--break-even analysis and replacement theory; and problems, worksheets, and solutions. Cross-references are given to related sections of a reference manual (NBS Handbook 135) and to case studies that illustrate the topics. The objectives of the seminar are to provide participants with a working knowledge of economic evaluation procedures for making building decisions, and to improve their decision-making abilities related to cost management and to the design and selection of buildings and building systems. Th seminar has been developed for building design engineers and architects, project planning and programming staff, managers of building programs, procurement officers and contract coordinators, building construction estimators, and building analysts. (Author)