During the life of a job, both JES2 and the base control program of z/OS® control different phases of the overall processing. Most jobs go through the following phases:

1. Input
2. Conversion
3. Processing
4. Output
5. Print/punch (hard copy)
6. Purge

With the exception of the processing phase, all job phases are controlled by JES2.

These phases are explained in more detail in JES2 job processing and functions.