Your clients' technology needs should be determined early, before you get framing, electrical, and HVAC bids. A qualified technology integrator will be able to provide electrical, cooling & framing requirements that these trades need to accurately bid the project. This in turn results in less change orders and project delays.
Note: a version of this form for architects & interior designers is at this link.
For detailed reasons why build pros should get the project's technology needs determined early, read the following linked article: "5 Tips for Implementing Home Technology Systems - Without the Pain!"