David W. Embley, Robert B. Jackson, and Scott N. Woodfield Brigham Young University Systems analysis is the study of a system for the purpose of understanding and documenting its essential characteristics.
Analysis is neither design nor implementation.
Analysis focuses on real-world problems, whereas design and implementation focus on computerized solutions. In general, we agree with this assessment. We surveyed several of the most popular object-oriented analysis methods and found that many of their features are more appropriate for design than analysis. It avoids being a preliminary design method because it specifically omits several design features.