diff --git a/src/definitions/SOL002SOL003VNFPerformanceManagement_def.yaml b/src/definitions/SOL002SOL003VNFPerformanceManagement_def.yaml
index 675a97fbc7d6e3ddc0a598edbb74868bd2b55a15..289e19d0e396d03801d97905d56f1683149091e6 100644
--- a/src/definitions/SOL002SOL003VNFPerformanceManagement_def.yaml
+++ b/src/definitions/SOL002SOL003VNFPerformanceManagement_def.yaml
@@ -520,6 +520,8 @@ definitions:
     description: >
       This type represents a notification that is sent when a threshold has
       been crossed.
+      The timing of sending this notification is determined by the capability
+      of the producing entity to evaluate the threshold crossing condition.
       The notification shall be triggered by the VNFM when a threshold has
       been crossed.
     type: object