The Software Metrics Decision Support System (SMDSS) methodology was developed to address the problem of selecting the "best" set of values for quantifiable software project goals commensurate with various constraints and management's desires. The methodology was prototyped in a proof-of-concept tool, called MAUS, which uses multiattribute utility theory (MAU). The MAU-based decision-making methodology is designed to aid software and systems managers in the use of a systematic, objective, and documentable quantification method. MAUS implements some novel aspects and extensions of the MAU methodology. MAUS uses MAU to explore a "space" of possible choices, and it utilizes a constraint equation to generate alternatives. The SMDSS methodology and the supportive MAUS tool promote implementation of the guidance provided in Practical Software Measurement: A Guide to Objective Program Insight (Newport, RI: Naval Undersea Warfare Center, March 27, 1996).