What does the "in service" date on blueprints signify?

The "in service" date on blueprints indicates the expected completion and operational date of the installation. This is a crucial milestone in any construction or installation project, as it reflects when the project is anticipated to be completed, fully functional, and ready for use. It doesn't merely mark when construction begins or when utilities might start; rather, it defines when everything should be in place for the installation to perform its intended purpose. This date helps in planning and scheduling for all stakeholders, ensuring that the project management aligns resources and expectations effectively.