Giving a person a set of responsibilities which is both higher than and lower than the level at which the responsibilities of their current job are set. See job enlargement.
Making fundamental change to the way that work gets done, well beyond when the job is done (e.g., flextime, rotation) and how much is done (enlargement).
Job Enrichment is the addition to a job of tasks that increase the amount of employee control or responsibility. It is a vertical expansion of the job as opposed to the horizontal expansion of a job, which is called job enlargement.