This document discusses different models of the project cycle. It describes the Baum cycle, which includes 5 stages: identification, preparation, appraisal and selection, implementation, and evaluation. It also discusses DEPSA's 6-stage project cycle and UNIDO's 3-phase cycle. The stages/phases generally involve identifying project opportunities, conducting preliminary and feasibility studies, getting approval, implementing the project, operating it, and evaluating outcomes to inform future projects. Detailed descriptions are provided of what occurs at each stage for different models.