competency modeling

What is (or should be) the difference between competency modeling and traditional job analysis?

In addition, data modeling (using UML class diagrams), goal modeling and competency modeling (skill requirements and skills possessed) can be integrated with the process models".

Various adaptations of job-analytic methods include competency modeling, which examines large groups of duties and tasks related to a common goal or process, and practice analysis, which examines the way work is performed in an occupation across jobs.