Help me prove 8 hr shifts require more FF's than 24 hr ones
Citizen trying to help my 22 FF career dept prove to doubting townspeople that current 24 hr XoXooooo shifts uses less people and is better than 8 hr shifts. I've found a nbr of sites/forums that have some good replies to this topic which I've extracted to a summary document. I recall seeing a great reply to a forum post (I think on this site) that mathematically showed how 8 hr shifts needs more staff to get same coverage but that was a few months ago and can't find it now (tried for a few hrs!)
It's a New England dept using 4 shifts of 6/6/5/5 (two are 1 FF short) so 22 FF total. We have a fair amount of call-backs due to distance to hospital so they are on primary/alternate call on two of their 5 day off period. I don't know how many actual hrs of OT are used in a year but it's enough so that OT is $500K+ total and of concern to many in town. So some are asking: wouldn't we have less OT on 8 hr shifts?
I've seen other places where it's stated that that would cause even more OT due to two more shift changes which may result in hold-overs. And that 8 hr shifts work well for PD work but not for FD work. And a nbr of other good reasons why it's not practical...But..I'd like to find that thread that showed by pure math how it needs more FF or have someone post similar. I've tried to compute myself but must be missing something because I'm not getting the 20%-40% more staff I've seen mentioned.
I do not yet know how/when OT is triggered in our dept and that may be key to this. I know about the 56 hr FSLA rule but we have 42 hrs per 7 day (48 per 8 day) period so not sure it works. We apparently don't deviate from the std XoXooooo scheme at any time except for vacations.
Thanks for any help!!