Key Result Areas (KRAs) define the expected outcomes or results of a job, while Key Performance Areas (KPAs) define all the activities an individual must perform in a job, whether result-oriented or not. KRAs fall within the scope of KPAs and identify crucial outcomes important for achieving goals, while KPAs define the overall scope of activities for a role. A job description separates duties into KRAs, which are critical functions tied to results, and KPAs, which are important but not critical associated activities.