A job is defined by parameters, a schedule, and a target list. Each time a job runs, it creates an execution, which can be thought of as an instance of a job. This job instance has a lifecycle, hence, it has discrete states:
Job is Scheduled
Job is Running
Job finishes in either Succeded or Failed state depending on what happened when the job actually ran
Because a job can run against multiple targets, each time a job runs, there can be more than one execution. For example, a job is runs once each day against five targets. This results in five executions per day, seven days a week. The set of executions on any given day is called a run.
Single vs. Multiple Execution Runs
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