I think it would be more challenging for a project manager to work in a matrix based organizational project. In the matrix based project you must coordinate with other functional departments more and must structure your project around other department groups. This will require the project manager to coordinate with all the other departments to see when each member of their team will be available. Then if everyone is not available at the same time the team will need to coordinate better and restructure their project. If the project manager was in a project management matrix, then they have all their team members already set and can operate within their own group without having to worry about time restrictions set by other department groups. Also, since the project manager is now in sole control of the group they will not need to meet with other group leaders to make decisions, they will not need to negotiate and they can speed up the project development process. In addition, having full control of your team and having everyone working consistently with each other will increase team chemistry and team success in the project based organization.