What is meant by the term 'occupation class'?

The term 'occupation class' refers to a grouping of similar occupation types, which encompasses a range of job roles that share common characteristics or functions. This classification allows for more effective analysis, comparison, and understanding of job types within an industry or sector. For example, an occupation class might include all types of educators, such as teachers, professors, and education administrators, highlighting their shared responsibilities and qualifications.

The other options do not capture the essence of 'occupation class.' A single job role refers to an individual position, which is too narrow to represent the broader concept of classification. The level of salary pertains specifically to compensation, which does not define a category of occupations. Lastly, the hierarchy of job titles emphasizes the ranking and structure of positions within an organization rather than categorizing them based on their similarities. Thus, the concept of an occupation class is specifically concerned with the collective nature of similar job types.