Outbound program

Hello we are looking to bring back a currently outsourced outbound operation back in house and increasing our team (currently outsourced to several different companies, current team on inbound only) and I have been tasked with putting together (at a high level for the time being) a checklist of all the area's that we need to consider - has anyone had experience of this in the past and can help by listing the main considerations - staff , dialler technology etc and also any of the potential pitfalls ! thanks very much