Skill levels rate how well an employee performs at a job. Employee advancement is often based on attainment of a particular job skill level. Skill levels are assigned to employees during Employee Configuration to rate an employee’s proficiency at a particular job.
For example, skill levels can be Trainee, Novice, Proficient, or Expert. Within those categories you can have sub-categories from 10-1, 10 being the least proficient and 1 being an expert. Therefore, it is possible to have a Level 1 Novice whose next promotion would be a Level 10 Proficient.