A host of opportunities is currently available for rebuilding Egypt's existing irrigation system and developing new systems. This report outlines a methodology for comparing various irrigation water distribution systems prior to implementing an irrigation program. Following a brief discussion of benefit/cost analyses, the authors recommend use of partial-budget analyses (a related but simplified approach), largely because the data needed for detailed analysis are not always available. The partial-budget methodology presented here centers on the use of a set of worksheets (provided in an appendix). As an example of partial-budget analysis in action, the worksheets are used to analyze an irrigation system located in Upper Egypt near El Minya. The report also discusses the relationship between partial-budget analysis and net present value analysis and compares the results obtained by each method. Finally, various methods for extending the usefulness of the analytical methods (e.g., post-analysis for design innovation and identification of missing data) are discussed.