diff --git a/user-stories/proposed/ha_vm.rst b/user-stories/proposed/ha_vm.rst
index e6606df..478e859 100644
--- a/user-stories/proposed/ha_vm.rst
+++ b/user-stories/proposed/ha_vm.rst
@@ -50,6 +50,9 @@ can be detected and recovered by the system. Possible failure events include:
 
 * Availability Zone/Data Center/Region failure
 
+N.B. This user story concerns high availability, not 100% availability.
+Therefore some service interruption is usually expected when failures occur.
+The goal of the user story is to reduce that interruption via automated recovery.
 
 Usage Scenario Examples
 +++++++++++++++++++++++