diff --git a/xyz/openbmc_project/State/BMC.interface.yaml b/xyz/openbmc_project/State/BMC.interface.yaml
new file mode 100644
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+++ b/xyz/openbmc_project/State/BMC.interface.yaml
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+description: >
+   Implementation of BMC state management.  When rebooting we are in
+   transition.  When Ready all services required are running
+   successfully.  When we are Not Ready this implies not all services
+   have started that are required to be.
+
+properties:
+   - name: RequestedBMCTransition
+     type: enum[self.Transition]
+     default: 'None'
+     description: >
+         The desired BMC transition
+
+   - name: CurrentBMCState
+     type: enum[self.BMCState]
+     description: >
+         The current state of the BMC and is a read-only property.
+
+enumerations:
+   - name: Transition
+     description: >
+       The desired transition for the BMC firmware
+     values:
+       - name: 'Reboot'
+         description: >
+           BMC system should be rebooted
+       - name: 'None'
+         description: >
+           No transition is in progress
+
+   - name: BMCState
+     description: >
+       The current state of the BMC firmware
+     values:
+       - name: 'Ready'
+         description: >
+           Ready implies all services started and are running successfully
+       - name: 'NotReady'
+         description: >
+           Not ready implies not all services have started or are not running successfully