 is business-day overlap between time zones and reserve the remainder of the Implementing Group-Oriented Systems time for domestic connections, when hours of business overlap to a greater degree. For instance, early morning room bookings might be reserved for European connections, late afternoons held open for Asian conferences, and mid-day hours for Pacific, Mountain, Central, and Eastern time zones. A business unit may buy its own equipment and prioritize its own use over that of others. Some groups make excess capacity available to others at a price. In other cases, policy states that the system is to be used exclusively by the department that purchased it. Others cannot use it even if it is sitting idle. Excess corporate capacity is often brokered through a public room service. The decision to sell excess capacity introduces a host of priority-related issues. What if the room is scheduled for outside rental when an executive needs to conduct an urgent meeting? If the system is made available to outside groups, what is the cost, and how is the schedule arranged? Who is responsible for billing and collections? What type of use is appropriate for the system? How does the importance of a meeting affect scheduling? Some companies allow important meetings to bump routine meetings. Policy should be established for asking someone to postpone a pre- scheduled session. Nevertheless, most companies authorize an employee to refuse such a request; doing SO discourages executives from routinely bumping scheduled meetings. When they know they can get the room any time they want it, senior managers may be less likely to plan. Many organizations levy cancellation charges on users who cancel a conference at the last moment. These are generally charged to the cost center as a thirty-minute minimum charge (and often waived if the facility can be otherwise re-scheduled). Some companies that own numerous geographically separate videoconferencing rooms assign a coordinator to each local site. In such a case, the site coordinator sh