Details to Set/Activate Scheduler
- Make sure that you are logged in as a Salesforce Admin
- Go to Setup
- Click on Develop
- Click on Apex Classes
- Click on Schedule Apex Button
- In Schedule Apex page provide any Job Name that you want
- Set Apex Class to "v4sUpdateShift"
- Set the Frequency as per your requirement and also select a Preferred Start Time
- Click on Save.
Note: Select the above mentioned Apex Class from the search button
Now the Scheduler is set, and this scheduler will run at the "Preferred Start Time" and Frequency that you have selected.