15. Doesn't matter, those people are STILL classified as 'part-time' employees.
Yes, they DO work more than 28 hrs. a week sometimes, and NO, they still did not get full-time benefits.
Kroger would make sure that hours worked in any given quarter never cross the threshhold of automatically kicking in full-time status.
The part-tme employees have no rights under the contract to work more hours than their initial hire classification, and as long as the employer schedules the employee at least the minimum hours available, the employee has no grievance.