Hank is a project manager for the NHY Project. His project has a very tight budget with little room for project overruns on costs. Hank needs to control costs and reduce expenses as much as possible within the project in order for the project to be deemed successful in the organization. On the NHY Project, Hank is using many contractors that are integrated into the project team. What can Hank do to keep project costs down in this scenario?