> #### Single Execution Policy

> When you define a job to run At Startup or One Time, the Single Execution Policy determines the time between runs. If a job runs at startup, it executes when the AdminServer starts (through the `proadsv -start` command on UNIX or NT Services on Windows 2000 and Windows NT). With the Single Execution Policy, the job does not run again until the next time the AdminServer starts. If the job is defined as One Time, the Single Execution Policy ensures that the job, after completion, is permanently disabled. One Time jobs are reenabled only if you define new start times and Repeat Intervals for them on the Schedule page.

> ##### At startup

> Job execution begins with the starting of the AdminServer at 7:30 AM.

> Job execution ends at 7:45 AM.

> The job does not begin again until the AdminServer is restarted.

> ##### One time

> Job execution begins at its scheduled time, 6:15 PM.

> Job execution ends at 6:53 PM.

> The job is disabled. It will not run again unless its starting date and time are redefined on the Schedule page.

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