One person determines whether your construction project finishes on time and on budget or suffers through avoidable and expensive delays: the project manager. From what I've noticed, you have your pick of two types of project managers: suits and hard hats. Suits manage the big picture from afar and hard hats set up shop at the construction site. I've worked with both. A suit helped us open the Tennessee Valley Eye Center in Knoxville while a hands-on hard hat worked with us on the Johnson City Eye Surgery Center in Johnson City, Tenn. Both delivered what they promised and both managed successful projects. Here's some advice on which personality type would best suit (no pun intended) your project.