In order to become a shift supervisor you really have to been with the company for a certain amount of time and proven yourself performance wise.
A shift supervisor in responsible for scheduling the right amount of staff and making sure the certain levels of productivity are followed.
Any problems pertaining to the shift that include people calling in sick, will require the shift supervisor to replace the employee that is not able to work in order to ensure that production levels continue.
Some companies offer shift supervisor jobs during peak production times. For example, UPS offers shift supervisor jobs during the Christmas holiday season.
Because of the sheer number of packages that need to be processed during that time, UPS offers additional seasonal opportunities for regular employees as well as production supervisor jobs. Sometimes if the supervisor performs well, UPS will extend a full time opportunity.