Weddingbee boards

I'm trying to decide whether to do formal pictures (me and FH and family) before the ceremony or after the ceremony during cocktail hour.  I'm trying to come up with two timelines (preceremony pictures or post ceremony pictures). I've been at too many weddings where the scheduling is off and things are rushed towards the end.  Can I get some sample timelines starting from preceremony to cake cutting time?  I'm unsure of how much time to allocate for each part.  Thanks ladies!