The rule of thumb is: if you quit before 1 year of employment, you will get a negative re-hire status. If you are past your 1 year and have been a good employee and leave in good terms, you will most likely get a positive re-hire status, those are guidelines. Every situation will be reviewed by the management team. If you work for just 6 months but have to leave because of school or family reasons, you could get a positive re-hire, if management is cool with their employees, then they will bend that 1 year guideline.