MIL-HDBK-1191
responsible for "approving" equipment, an installation, or a
procedure. For Department of Defense Medical and Dental Treatment
Facilities, and the MIL-HDBK 1191, the authority having
jurisdiction is the Defense Medical Facilities Office (DMFO).
See also Governing Body.
Autoclave.
An apparatus for sterilizing utilizing steam under
pressure.
Automated Guided Vehicle System (AGVS). Also known as
"Driverless Vehicle System" (DVS): This system utilizes a battery
powered, electronically controlled vehicle that follows a
predetermined route (guide path or track that is buried in the
floor or adhered to its surface) to move carts and material
throughout the facility. The system utilizes the guide path
network and special elevators to make the horizontal and vertical
routings. Different degrees of automation and capabilities are
available. The basic system components commonly found in a
hospital application include: Driverless Vehicles, Elevators,
Carts (Modules), Guide path and controls, Cartwash(s), Battery
charge equipment, etc.
Average Interval. The elapsed time in seconds between elevator
departures from a terminal floor, averaged over a specific time
period. Average interval is a measure of the "quality" of
elevator service. Average interval can be measured in existing
buildings but must be calculated for new buildings. For
practical purposes it can also be viewed as the average round
trip time of an elevator, divided by the number of elevators
within the group in question. Average interval is not a direct
measure of how long prospective passengers wait for service.
Average Maximum Ride Time (A.M.R.T). The amount of time a
passenger is in an elevator from the point of origin to the
destination is referred to as the "ride time".
Average System Response Time. The average time it takes for hall
calls to be answered by an arriving elevator car. This is an
estimated or simulated factor for new facilities but can be
measured for existing facilities.
Average Waiting Time. The average period that users wait for
elevator service. This is an estimated, or simulated factor.
For example, if one person arrives at a lobby and initiates a
hall call, and waits for 20 seconds for the car to arrive, while
a second person arrives at the same time as the car, the average
for these two persons being served is 10 seconds (20 seconds plus
0 seconds divided by two). Tests indicate that average passenger
waiting time (AWT) for service at a typical intermediate floor
approximates 65% to 80% of the average interval during heavy two-
way traffic periods.
Backflow Prevention. The use of a recognized device to prevent
the backflow of water or other liquids, mixtures, or substances
GLOS-4
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