Final answer:
The Classification Method is the job evaluation process that categorizes jobs based on predefined class descriptions, whereas other methods like the Job Ranking, Point, or Factor Comparison methods use different approaches to evaluate jobs.
Step-by-step explanation:
The job evaluation method based on job class descriptions into which jobs are categorized is the Classification Method. This method involves grouping jobs into predefined classes which are commonly found in various sectors. Each class has a general description to which jobs are compared and then classified accordingly. This contrasts with other methods, such as the Job Ranking Method, which involves ordering jobs based on overall worth; the Point Method, where points are assigned to predefined factors; and the Factor Comparison Method, where jobs are ranked based on key factors.