Access and scheduling
Ask purchasing early what it needs from a vendor: a written scope, a W-9, insurance certificates, and any agency forms. We supply the scope and a certificate of insurance on request, and your purchasing office decides when the order is issued and whether a later change needs an amendment.
Security is the other lead time. Federal buildings around Government Center and regional offices in secured towers may want crew names and dates of birth ahead, screen everyone and every cart at a single entrance, and require an escort on restricted floors. Some limit when carts can cross the lobby. Ask the building for its loading dock hours and freight elevator bookings, and plan the public counter's last day around them.
