The past few years have seen several studies reporting on the role of a Security Operations Center (SOC)analyst and metrics for assessing the performance of analysts. However, research suggests that analysts aredissatisfied with existing metrics as they fail to take into consideration several aspects of their tasks. Existing worksadvocate for research into this area. A major challenge to devising adequate metrics is that the real work of analyststhat needs to be taken into consideration to assess their holistic performance has not been fully discussed.Furthermore, at present, there is no agreement on what constitutes core analysts’ functions. Analysts’ overallperformance in a SOC could be obtained if there is a common agreement on the core functions upon which theirperformance can be evaluated. In this paper, we propose a framework depicting the core functions of analysts andKPIs that can be used to measure the performance of analysts. To do this, we conducted a thorough analysis of thefunctions of a SOC described in multiple sources of literature and engaged with several analysts and SOC managersfrom different industries using qualitative semi-structured interviews. Our research results identify the following:quality of analysts’ analysis, quality of analysts’ report, time-based measures and the absolute numbers derived froman analyst’s tasks as the key performance indicators (KPIs) for assessing analysts’ performance. We hope that ourfindings will stimulate more interest among cybersecurity researchers on assessment methods for analysts.