Planning For Failure
I've worked extensively with Infor systems, and think it is a pretty good product.
Where I've seen projects fail is when they are farmed out externally. They hire contractors who have no skin in the game, don't necessarily know the system, and will jump ship before the project is complete - taking their project knowledge with them - for another gig so they have no downtime. And for God's sake don't throw more people at the project. You're going to fragment the knowledge of what is going on, increase communication problems, sow confusion for accountability and actually slow things down.
If this is going to be your system, own it from the beginning. Have your staff get up to speed and plan for and implement it.
They'll be better prepared to support it and address any problems. If you don't have the staff, perhaps rethink what you're doing.