A zone is a defined area set apart for a purpose. In asset tracking, it is an area that means something operationally, such as the IT store, Ward 3, the dispatch docks or a contractor yard, used to record which area an asset is in and to say where it belongs. Zones usually group several rooms or locations, so they are coarser than a single shelf or room.
An asset’s zone is normally where it was last seen, not a live coordinate. With RFID, it is the zone of the reader that last read the tag. With GPS, it is the geofence the last position fell inside.
Types of zone
| Type | Defined by | How assets are detected | Example |
|---|---|---|---|
| RFID reader zone | Rooms and doors covered by fixed readers or portals | A tag is read crossing the boundary | Secure cage, IT store, dock |
| Geofence zone | A circle or polygon on a map | A GPS fix from a tracker or a phone scan | Depot yard, jobsite |
| Logical zone | A group of locations in the register, with no hardware | Someone scans the asset or records a move | Ground-floor clinical areas |
Zone vs location vs geofence
| Item | Location | Zone | Geofence |
|---|---|---|---|
| What it is | A specific place in the hierarchy: site, building, floor, room | A named group of locations that matters for control | A virtual boundary on a map |
| Granularity | One room or area | Several rooms, a store or a whole floor | Usually tens of meters or more |
| Used for | Where an asset lives; audits and reports | Movement rules and alerts | Outdoor site alerts |
An asset location answers "where does it live?". A zone answers "which area is it in, and is it allowed there?". Geofencing is the map-based version for outdoor sites.
How RFID zone tracking works
- Build the location tree: site, building, floor, room.
- Group locations into a zone, for example "Zone D · Secure cage".
- Mount fixed readers on the doors and assign each to its zone.
- Readers report direction: in, out or simply present.
- Each read is stamped with the zone, turning "tag 3F2A seen by reader 7" into "Infusion pump 22 entered Ward 3".
- Rules decide what is allowed, which makes zone-exit alerts possible.
Examples of zones by industry
- Hospital: each ward is a zone, so shared pumps and monitors that drift to another ward show up.
- Warehouse: dispatch docks, bulk storage and the secure cage, with a portal at the exit gate.
- School: the IT store and AV cupboard, where laptops and projectors are issued.
- Manufacturing: the tool crib and calibration lab, where instruments must stay.
- Hotel: guest floors, so TVs and equipment that leave a floor are noticed.
Zone design tips
- Match zones to decisions. If nobody would act differently knowing an asset moved between two rooms, make them one zone.
- Cover the choke points. Put readers or portals on the doors assets actually leave through. An unmonitored side door is a gap.
- Keep storage away from the reader. Tags stored beside a portal cause stray reads.
- Start small. Zone one high-value store first, tune it, then expand.
- Set rules by category, such as "pallet scales stay in dispatch", rather than asset by asset.
Common mistakes
- Treating a zone as an exact position. A reader zone tells you the last boundary crossed, not where the asset sits in the room.
- Too many tiny zones, which multiply readers and alerts without better decisions.
Zones in a spreadsheet
Without hardware, you can add a Zone column that groups locations, and filter or total by it. That helps with reporting, but the zone only changes when someone edits the row, so it cannot tell you when something leaves. Detection needs readers at the boundary or GPS outdoors.
Zones in Asetavo
In Asetavo, a zone is a named, coded set of locations from your property, building, floor and room tree (Business plan). Fixed readers are assigned to zones, and every read is stamped with the reader’s zone. Readers report direction, and rules for left zone, entered zone, unregistered tag and exit without check-out turn zone events into alerts. Asetavo tells you which zone last saw the tag; it is not an indoor positioning (RTLS) system. Outdoor sites use GPS geofences instead. Drawing zones on floor plans and dwell-time reports are on the roadmap. See zones and RFID readers and portals.
