The notion of job depth corresponds very closely to what Hackman and Oldham call skill variety.

Job depth, more commonly referred to as job enrichment or the depth of a job, pertains to the degree of control, autonomy, and decision-making authority an employee has over their work. In contrast, Hackman and Oldham's concept of skill variety is one of the core job dimensions in their Job Characteristics Model, which focuses on the range of skills and activities required to perform a job.