b4035917_roject__Program__and_Portfolio__Portfolio
[Characteristic] Success [Project] Success relates to the project and is measured generally by the criteria of completing the project within the planned budget, cost, and scope. The degree of customer satisfaction is another parameter to measure success. [Program] Success relates to the overall program and is measured in terms of benefit delivery expected from the program. [Portfolio] 
Success relates to the overall portfolio performance, which is an aggregated performance of all of its components: programs and projects.
Become a Certified Project Manager: Chapter 13: Relationship between Project, Program, and Portfolio
Portfolio