You can restart a job if it fails; this starts a new run which continues from the failure point.
A restarted job differs from a new job in the following ways:
It uses the same tag number as the failed run, and replaces the failed run in the Completed list.
By default, it starts from the failed step, and does not repeat any of the steps that passed in the previous run. However, you can choose which steps actually run when you restart the job.
By default, the system supplies the same environment variable values that you supplied on the previous run, with the exception that all environment actions become Sets (see Variable Actions). However, you can change these before restarting the job.
The system evaluates the success of the job based only on the steps it runs during the restarted job. Failures in the prior run do not affect the status of the restarted job.
If a job fails, the system displays an icon on the Completed tab so that you can restart it. Click the icon to display a Restart page for the job. A Restart page is similar to a start page, but the system displays the outcomes of the steps from the failed job as colored dots (green for pass, red for fail, yellow for pass with warnings), and steps that ran in the failed job are selected for exclusion from the job.