Control can be simple or detailed.
Simple control - includes analysis of State and End date columns on Scheduled jobs page; it also includes analysis of Messages to user and error details fields on scheduled job edit form.
Detailed control - includes analysis of background jobs on Background jobs tab, that background jobs were created and executed to execute scheduled job.
Detailed control is made by filtering of the list of background jobs by a specific scheduled job and analysing background job attributes. Note, that scheduled job execution details are obtained by selection of a part of details of the last background job execution.
Note: the filter to background jobs is applied only by Refresh command, so after changing filter settings one should execute this command.