diff --git a/ApplicationCode/Commands/SummaryPlotCommands/RicSummaryCurveCreator.cpp b/ApplicationCode/Commands/SummaryPlotCommands/RicSummaryCurveCreator.cpp
index f26f3f0223..45d72e8b27 100644
--- a/ApplicationCode/Commands/SummaryPlotCommands/RicSummaryCurveCreator.cpp
+++ b/ApplicationCode/Commands/SummaryPlotCommands/RicSummaryCurveCreator.cpp
@@ -368,10 +368,8 @@ std::set<std::string> RicSummaryCurveCreator::getAllSummaryCaseNames()
 {
     std::set<std::string> summaryCaseHashes;
     RimProject* proj = RiaApplication::instance()->project();
-    std::vector<RimSummaryCase*> cases;
-
-    proj->allSummaryCases(cases);
-
+    
+    std::vector<RimSummaryCase*> cases = proj->allSummaryCases();
     for (RimSummaryCase* rimCase : cases)
     {
         summaryCaseHashes.insert(rimCase->summaryHeaderFilename().toUtf8().constData());
@@ -387,9 +385,8 @@ std::set<std::string> RicSummaryCurveCreator::getAllSummaryWellNames()
 {
     std::set<std::string> summaryWellNames;
     RimProject* proj = RiaApplication::instance()->project();
-    std::vector<RimSummaryCase*> cases;
 
-    proj->allSummaryCases(cases);
+    std::vector<RimSummaryCase*> cases = proj->allSummaryCases();
     for (RimSummaryCase* rimCase : cases)
     {
         RifSummaryReaderInterface* reader = nullptr;
diff --git a/ApplicationCode/ProjectDataModel/RimProject.cpp b/ApplicationCode/ProjectDataModel/RimProject.cpp
index 8789f06818..517b1e2b18 100644
--- a/ApplicationCode/ProjectDataModel/RimProject.cpp
+++ b/ApplicationCode/ProjectDataModel/RimProject.cpp
@@ -547,9 +547,10 @@ void RimProject::allCases(std::vector<RimCase*>& cases)
 //--------------------------------------------------------------------------------------------------
 /// 
 //--------------------------------------------------------------------------------------------------
-void RimProject::allSummaryCases(std::vector<RimSummaryCase*>& sumCases)
+std::vector<RimSummaryCase*> RimProject::allSummaryCases() const
 {
-    sumCases.clear();
+    std::vector<RimSummaryCase*> sumCases;
+
     for (RimOilField* oilField: oilFields)
     {
         if(!oilField) continue;
@@ -567,24 +568,8 @@ void RimProject::allSummaryCases(std::vector<RimSummaryCase*>& sumCases)
             sumCases.insert(sumCases.end(), observedData.begin(), observedData.end());
         }
     }
-}
 
-//--------------------------------------------------------------------------------------------------
-/// 
-//--------------------------------------------------------------------------------------------------
-void RimProject::allObservedData(std::vector<RimSummaryCase*>& observedData)
-{
-    for (RimOilField* oilField : oilFields)
-    {
-        if (!oilField) continue;
-        RimObservedDataCollection* observedDataCollection = oilField->observedDataCollection();
-        if (observedDataCollection)
-        {
-            observedData.clear();
-            std::vector<RimSummaryCase*> allObservedData = observedDataCollection->allObservedData();
-            observedData.insert(observedData.end(), allObservedData.begin(), allObservedData.end());
-        }
-    }
+    return sumCases;
 }
 
 //--------------------------------------------------------------------------------------------------
diff --git a/ApplicationCode/ProjectDataModel/RimProject.h b/ApplicationCode/ProjectDataModel/RimProject.h
index f8a80852c2..bb71149621 100644
--- a/ApplicationCode/ProjectDataModel/RimProject.h
+++ b/ApplicationCode/ProjectDataModel/RimProject.h
@@ -100,8 +100,9 @@ public:
     void            assignIdToCaseGroup(RimIdenticalGridCaseGroup* caseGroup);
 
     void            allCases(std::vector<RimCase*>& cases);
-    void            allSummaryCases(std::vector<RimSummaryCase*>& sumCases);
-    void            allObservedData(std::vector<RimSummaryCase*>& observedData);
+
+    std::vector<RimSummaryCase*>    allSummaryCases() const;
+    
     void            allNotLinkedViews(std::vector<RimView*>& views);
     void            allVisibleViews(std::vector<RimView*>& views);
 
diff --git a/ApplicationCode/ProjectDataModel/Summary/RimSummaryCurve.cpp b/ApplicationCode/ProjectDataModel/Summary/RimSummaryCurve.cpp
index 1a9152b932..1984dd8572 100644
--- a/ApplicationCode/ProjectDataModel/Summary/RimSummaryCurve.cpp
+++ b/ApplicationCode/ProjectDataModel/Summary/RimSummaryCurve.cpp
@@ -311,9 +311,8 @@ QList<caf::PdmOptionItemInfo> RimSummaryCurve::calculateValueOptions(const caf::
         fieldNeedingOptions == &m_xValuesSummaryCase)
     {
         RimProject* proj = RiaApplication::instance()->project();
-        std::vector<RimSummaryCase*> cases;
 
-        proj->allSummaryCases(cases);
+        std::vector<RimSummaryCase*> cases = proj->allSummaryCases();
 
         cases.push_back(proj->calculationCollection->calculationSummaryCase());