diff --git a/CN_PROD/slo/Wirkkette__Personal_Favorites__-_Reliability_of_key_requests.tf b/CN_PROD/slo/Wirkkette__Personal_Favorites__-_Reliability_of_key_requests.tf
index 0cffb0a..70b2631 100644
--- a/CN_PROD/slo/Wirkkette__Personal_Favorites__-_Reliability_of_key_requests.tf
+++ b/CN_PROD/slo/Wirkkette__Personal_Favorites__-_Reliability_of_key_requests.tf
@@ -15,17 +15,29 @@ module Wirkkette__Personal_Favorites__-_Reliability_of_key_requests {
 
     #metric expression of the calculation as done in data explorer ui
     metric_expression           = <<EOT
-    (100)-(builtin:service.keyRequest.errors.fivexx.rate:filter(and(or(in("dt.entity.service_method",entitySelector("type(service_method), 
+    (100)* ((builtin:service.keyRequest.errors.server.successCount:filter(and(or(in("dt.entity.service_method",entitySelector("type(service_method),
                         fromRelationship.isServiceMethodOfService(
-                                type(~"SERVICE~"),entityName.in(
-                                        ~"btc-destination-composite-service - PROD~"
-                                )
-                        )
-                        ,entityName.in(
-                                        ~"GET /api/v3/favorites~",
-                                        ~"POST /api/v3/favorites~",
+			        type(~"SERVICE~"),entityName.in(
+					~"btc-destination-composite-service - PROD~"
+					)
+				)
+			,entityName.in(
+					~"GET /api/v3/favorites/~",
+                                        ~"POST /api/v3/favorites/~",
+                                        ~"PUT /api/v3/favorites/<favoriteId>~" 
+			)"))))):splitBy())
+        /
+     (builtin:service.keyRequest.count.server:filter(and(or(in("dt.entity.service_method",entitySelector("type(service_method),
+                fromRelationship.isServiceMethodOfService(
+			type(~"SERVICE~"),entityName.in(
+					~"btc-destination-composite-service - PROD~"
+					)
+				)
+			,entityName.in(
+					~"GET /api/v3/favorites/~",
+                                        ~"POST /api/v3/favorites/~",
                                         ~"PUT /api/v3/favorites/<favoriteId>~"
-                        )"))))):splitBy())
+			)"))))):splitBy()))
 
     EOT