Much like the pre-construction and construction phases, there is no definitive line that separates construction from post-construction. On the contrary, Etka Contracting Inc often begins the post-construction processes on portions of a building while other areas are still undergoing construction. For instance, commissioning of mechanical systems starts long before substantial completion and floor-by-floor commissioning of a project. This is particularly applicable on projects with an aggressive schedule, with multiple phases that require portions to be signed off, open to the public while the rest of the project is finished, or projects with unique requirements, such as healthcare facilities.