diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9d2dd193b..94797c3dd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -16,6 +16,7 @@ and the versioning aims to respect [Semantic Versioning](http://semver.org/spec/
 - New files for new OMO v2023-08-23 import process (#1646)
 - new module oeo-shared-axioms.omn (#1649)
 - acceptance (#1698)
+- scenario projection comparison, model intercomparison study (#1711)
 
 
 ### Changed
@@ -23,6 +24,7 @@ and the versioning aims to respect [Semantic Versioning](http://semver.org/spec/
 - economy, economic scenario, trarget driven scenario, explorative scenario, policy scenario (#1642)
 - regionalistaion (#1644)
 - oeo.omn imports (#1649)
+- study (#1711)
 
 ### Removed
 - import and annotation scripts removed from repo. New repo is https://github.com/OpenEnergyPlatform/oeo-tools (#1686)
diff --git a/src/ontology/edits/oeo-model.omn b/src/ontology/edits/oeo-model.omn
index 7a689cc2e..391f64e21 100644
--- a/src/ontology/edits/oeo-model.omn
+++ b/src/ontology/edits/oeo-model.omn
@@ -3061,6 +3061,30 @@ pull request: https://github.com/OpenEnergyPlatform/ontology/pull/1639",
         <http://openenergy-platform.org/ontology/oeo/oeo-model/OEO_00010250>
     
     
+Class: OEO_00360002
+
+    Annotations: 
+        <http://purl.obolibrary.org/obo/IAO_0000115> "A model intercomparison study is a scenario study that performs a comparison of several models using a reference scenario."@en,
+        <http://purl.obolibrary.org/obo/IAO_0000233> "issue: https://github.com/OpenEnergyPlatform/ontology/issues/1640
+pull request: https://github.com/OpenEnergyPlatform/ontology/pull/1711",
+        rdfs:label "model intercomparison study"@en
+    
+    SubClassOf: 
+        <http://openenergy-platform.org/ontology/oeo/oeo-model/OEO_00010252>
+    
+    
+Class: OEO_00360003
+
+    Annotations: 
+        <http://purl.obolibrary.org/obo/IAO_0000115> "A scenario comparison study is a scenario study that performs a scenario projection comparison"@en,
+        <http://purl.obolibrary.org/obo/IAO_0000233> "issue: https://github.com/OpenEnergyPlatform/ontology/issues/1640
+pull request: https://github.com/OpenEnergyPlatform/ontology/pull/1711",
+        rdfs:label "scenario projection comparison"@en
+    
+    SubClassOf: 
+        <http://openenergy-platform.org/ontology/oeo/oeo-model/OEO_00010252>
+    
+    
 Individual: OEO_00000049
 
     Annotations: 
diff --git a/src/ontology/edits/oeo-shared.omn b/src/ontology/edits/oeo-shared.omn
index f640e17cc..94b0df0e4 100644
--- a/src/ontology/edits/oeo-shared.omn
+++ b/src/ontology/edits/oeo-shared.omn
@@ -1561,7 +1561,7 @@ Class: OEO_00020011
 
     Annotations: 
         OEO_00040001 "http://openenergy-platform.org/ontology/oeo/oeo-shared",
-        <http://purl.obolibrary.org/obo/IAO_0000115> "A study is a project with the goal to investigate something."@en,
+        <http://purl.obolibrary.org/obo/IAO_0000115> "A study is a project with the goal to methodologically investigate something."@en,
         <http://purl.obolibrary.org/obo/IAO_0000116> "The construct 'has funding source' some ('has role' some funder) is necessary, because has funding source has the range has role some funder. This range comes from issue https://github.com/OpenEnergyPlatform/ontology/issues/850 : funding source is some kind of independent continuant, i.e. a organisation or person, that does something special (giving money). So it is anything that has role some funder.",
         <http://purl.obolibrary.org/obo/IAO_0000233> "issue: https://github.com/OpenEnergyPlatform/ontology/issues/247
 pull request: https://github.com/OpenEnergyPlatform/ontology/pull/497
@@ -1574,7 +1574,10 @@ add axiom (study report)
 issue: https://github.com/OpenEnergyPlatform/ontology/issues/971
 pull request: https://github.com/OpenEnergyPlatform/ontology/pull/1011
 add etitor note
-pull request: https://github.com/OpenEnergyPlatform/ontology/pull/1025"@en,
+pull request: https://github.com/OpenEnergyPlatform/ontology/pull/1025
+add axiom (methodologically)
+issue: https://github.com/OpenEnergyPlatform/ontology/issues/1640
+pull request: https://github.com/OpenEnergyPlatform/ontology/pull/1711"@en,
         rdfs:label "study"@en
     
     SubClassOf: 
@@ -1583,6 +1586,7 @@ pull request: https://github.com/OpenEnergyPlatform/ontology/pull/1025"@en,
             Annotations: <http://purl.obolibrary.org/obo/IAO_0000233> "issue: https://github.com/OpenEnergyPlatform/ontology/issues/473
 pull request: https://github.com/OpenEnergyPlatform/ontology/pull/557"
         OEO_00000509 some (<http://purl.obolibrary.org/obo/RO_0000087> some OEO_00090001),
+        <http://purl.obolibrary.org/obo/RO_0000057> some OEO_00020166,
         <http://purl.obolibrary.org/obo/RO_0000057> some <http://purl.obolibrary.org/obo/IAO_0000100>,
         <http://purl.obolibrary.org/obo/RO_0002234> some OEO_00020012