I've been interviewed for a role which the company says is permanent but is only being offered on a 6-month contract initially. They say this is because they want to use that 6 month period to define the role and responsibilities as it is replacing someone going on maternity level who isn't going to return and they want to take the opportunity to revise the job description.
I can't think of any reason why this couldn't be done under a permanent job offer though. Under 2 years' service you have minimal employment rights anyway so it would be relatively easy to get rid of the new person if things don't work out for whatever reason.
Naturally I wouldn't want to accept the role on these terms as there's no guarantee of a permanent role at the end of it, however adamant they are now.
Can anyone with more HR experience me see what sensible reason there could be for this way of doing things (if any)?