1) The Business Hours feature of Case Flags has a scheduled Apex job that is used to set the FLAGS__PreviousBusinessHours__c field (and FLAGS_METRICS__Business_Hours_Elapsed_Previous__c if using the Metrics Extension) with the number of business hours that have lapsed prior to the current day. Because of Salesforce platform limitations, this needs to be done as a scheduled job and can't be computed in real-time.

2) The Automatically Clear Flags on Closed Cases feature has a scheduled Apex job that is used to clear the flags on cases that have been closed for the number of days defined in the setting.

3) The Automatically Delete Historic Case Flags History Tracking Records feature has a scheduled Apex job that is used to delete historic Case Flags History Tracking based on the period of time specified in the setting (once a week).

1) When Business Hours is enabled in Case Flags, a scheduled Apex job is created in the background that runs periodically. Scheduled Apex runs under the Salesforce user that created the job, which is the user that enabled Business Hours in Case Flags Setup.

The purpose of the job (in the main Case Flags package) is to calculate the value of FLAGS__PreviousBusinessHours__c with the amount of business hours that have lapsed prior to the current day. Because of Salesforce platform limitations, this needs to be done as a scheduled job and can't be computed in real-time. This job will include all cases which are currently flagged (Case Flag Date/Time <> NULL), and is used to help the next day of flag aging pick up where it left off.

For those who have installed the Case Flags Metrics Extension , this job will update the value FLAGS_METRICS__Business_Hours_Elapsed_Previous__c of all open cases which have been enabled for Case Flags (regardless if the case is currently flagged).

• For those with the Metrics Extension installed and Organization-Wide enabled, this will apply to all open cases.
• For those with the Metrics Extension installed and Organization-Wide disabled, this will apply to all open cases where the Enable Case Flags checkbox field is populated.

When this job runs at the end of Business Hours, the Last Modified Date/Time and Last Modified By ID (User) are updated with the date/time the Apex job ran and the User the job ran under, respectively. Last Modified fields are "System Audit Fields" and changes to them can't be avoided.

Important: If you use the Last Modified Date/Time field to monitor activity on Cases, consider creating a custom date/time field and using workflow to update it when specific actions occur.

If you would like the job to run under a different user such as a dedicated API user, log in as that user, disable Business Hours in Case Flags Setup, and re-enable it.

If Case Flags is not used for all cases in your organization, you can limit the "scope" of the business hours Apex batch job.
For more information, please review our documentation on Configuring Selective Processing here .

Additional Information:
http://www.salesforce.com/us/developer/docs/api/Content/system_fields.htm
http://help.salesforce.com/HTViewHelpDoc?id=code_schedule_batch_apex.htm&language=en_US

2) When Automatically Clear Flags on Closed Cases is enabled in Case Flags, a scheduled Apex job is created in the background that runs periodically. Scheduled Apex runs under the Salesforce user that created the job, which is the user that enabled Automatically Clear Flags on Closed Cases in Case Flags Setup.

The purpose of the Flag Cleanup Job is to clear the flag on closed cases, accounting for situations where the flag may not be cleared by the event rules defined in the Setup Wizard, or any other local automation.

3) When Automatically Delete Historic Case Flags History Tracking Records is enabled in Case Flags, a scheduled Apex job is created in the background that runs periodically. Scheduled Apex runs under the Salesforce user that created the job, which is the user that enabled Automatically Delete Historic Case Flags History Tracking Records in Case Flags Setup.

The purpose of the History Cleanup Job is to save the data you need for reporting purposes, and delete what you don't. It runs once a week at the specified date/time in the Setup Wizard.