A bank operates two CPUs in a Shared-Spool environment. Each CPU is used for a different task – one handles activities related to the stock market; the other for handles all other activities of the bank. To maximize reliability and availability the bank operates two separate Control‑M production systems. When one CPU goes down (for any reason), the other continues performing its tasks.

These two Control‑M systems communicate with each other by scheduling special jobs. For instance, Control‑M system A can schedule a special job that invokes the utility IOACND to add a prerequisite condition in the IOA Conditions file of Control‑M system B. This prerequisite condition can in turn trigger the submission of jobs by Control‑M system B.