Final answer:
Weighting the importance of job duties in performance management systems is essential because job duties vary in importance across different roles, aligning with organizational culture and employee performance expectations.
Step-by-step explanation:
It is necessary to weight the importance of job duties when establishing a performance management system because the importance of job duties varies from job to job (d). According to Davis and Moore, the degree of skill required often determines a job's importance, which in turn affects the number of qualified individuals available for that role. High skill jobs like designing highway systems or performing surgery require a greater level of expertise and are consequently rarer and more critical than jobs requiring less specialized skills, like answering phones or cleaning.
Weighting job duties within a performance management system ensures that employees are evaluated mainly on the aspects of their jobs that are most critical to the organization's success. This is particularly relevant in organizational culture, where the values, hierarchies, and interpersonal interactions can heavily influence the effectiveness of performance appraisals. By correctly weighting the more vital duties, the system more accurately reflects the requirements for success in each role, and thereby, reads better results in employee performance and motivation.