The hardest part of a matrix based organization would seem to be getting people to be on their project team. If a person if involved in other projects it may be hard to coordinate with that person to get them involved in their project. It does seem like a way to fully utilize all of the resources available in the company without having to duplicate work. On the flip side there could also be an overload of work on a person if they are wanted on every single project. Another good thing about the matrix based organization is that those who are on the project team will always have their functional manager to rely on when they may need help.