What is a Concern? Are properties or areas of interest Can be functional or nonfunctional (quality,systemic) At different abstraction levels: Problem domain concerns vs.solution domain concerns Requirements vs.design Design vs.implementation Object Oriented Analysis and Design 4Object Oriented Analysis and Design 4 What is a Concern? w Are properties or areas of interest w Can be functional or nonfunctional (quality, systemic) w At different abstraction levels: § Problem domain concerns vs. solution domain concerns § Requirements vs. design § Design vs. implementation