I've been TPS for a year and I've worked full time the entire time. However, earlier this year (Jan or Feb, I don't quite remember), AP had its hours cut, so we were only allotted 60 hours for two TPSs instead of 40. Lucky for me, the other TPS at my store quit right before that happened, so I didn't have to lose any hours. That, of course, made our second position only part time, which we still haven't filled (I think it has to do with the amount of hours). However, I've heard that we've gained more hours, so we're back to two full time TPS positions. So, generally, TPS will be full time, but there are exceptions.