diff --git a/edu.cuny.hunter.streamrefactoring.core/src/edu/cuny/hunter/streamrefactoring/core/analysis/StreamAnalyzer.java b/edu.cuny.hunter.streamrefactoring.core/src/edu/cuny/hunter/streamrefactoring/core/analysis/StreamAnalyzer.java
index 58a00913..cbe5b0d2 100644
--- a/edu.cuny.hunter.streamrefactoring.core/src/edu/cuny/hunter/streamrefactoring/core/analysis/StreamAnalyzer.java
+++ b/edu.cuny.hunter.streamrefactoring.core/src/edu/cuny/hunter/streamrefactoring/core/analysis/StreamAnalyzer.java
@@ -26,8 +26,10 @@
 import org.eclipse.core.runtime.SubMonitor;
 import org.eclipse.jdt.core.IJavaProject;
 import org.eclipse.jdt.core.dom.ASTVisitor;
+import org.eclipse.jdt.core.dom.FieldDeclaration;
 import org.eclipse.jdt.core.dom.IMethodBinding;
 import org.eclipse.jdt.core.dom.ITypeBinding;
+import org.eclipse.jdt.core.dom.MethodDeclaration;
 import org.eclipse.jdt.core.dom.MethodInvocation;
 import org.eclipse.jdt.internal.corext.util.JdtFlags;
 
@@ -61,6 +63,12 @@ public class StreamAnalyzer extends ASTVisitor {
 
 	private static final int N_FOR_STREAMS_DEFAULT = 2;
 
+	private int numberOfMethodForStreamReturnType;
+
+	private int numberOfMethodForStreamParameter;
+
+	private int numberOfFieldForStream;
+
 	private static void addImplicitEntryPoints(Collection<Entrypoint> target, Iterable<Entrypoint> source) {
 		for (Entrypoint implicitEntryPoint : source)
 			if (target.add(implicitEntryPoint))
@@ -511,4 +519,49 @@ public boolean visit(MethodInvocation node) {
 
 		return super.visit(node);
 	}
+
+	@Override
+	public boolean visit(MethodDeclaration methodDeclaration) {
+		IMethodBinding methodBinding = methodDeclaration.resolveBinding();
+		ITypeBinding returnType = methodBinding.getReturnType();
+		boolean returnTypeImplementsBaseStream = Util.implementsBaseStream(returnType);
+		if (returnTypeImplementsBaseStream) {
+			numberOfMethodForStreamReturnType++;
+			super.visit(methodDeclaration);
+		}
+		ITypeBinding parameterTypes[] = methodBinding.getParameterTypes();
+		if (parameterTypes.length < 1)
+			return false;
+		else {
+			for (ITypeBinding parameterBinding : parameterTypes) {
+				if (Util.implementsBaseStream(parameterBinding)) {
+					numberOfMethodForStreamParameter++;
+					break;
+				}
+			}
+		}
+		return super.visit(methodDeclaration);
+	}
+
+	@Override
+	public boolean visit(FieldDeclaration fieldDeclaration) {
+		ITypeBinding fieldBinding = fieldDeclaration.getType().resolveBinding();
+		if (Util.implementsBaseStream(fieldBinding)) {
+			numberOfFieldForStream++;
+		}
+		return super.visit(fieldDeclaration);
+	}
+
+	public int getNumberOfMethodForStreamReturnType() {
+		return this.numberOfMethodForStreamReturnType;
+	}
+
+	public int getNumberOfMethodForStreamParameter() {
+		return this.numberOfMethodForStreamParameter;
+	}
+
+	public int getNumberOfFieldForStream() {
+		return this.numberOfFieldForStream;
+	}
+
 }
diff --git a/edu.cuny.hunter.streamrefactoring.core/src/edu/cuny/hunter/streamrefactoring/core/refactorings/OptimizeStreamsRefactoringProcessor.java b/edu.cuny.hunter.streamrefactoring.core/src/edu/cuny/hunter/streamrefactoring/core/refactorings/OptimizeStreamsRefactoringProcessor.java
index 02eeb7e9..6641cacc 100644
--- a/edu.cuny.hunter.streamrefactoring.core/src/edu/cuny/hunter/streamrefactoring/core/refactorings/OptimizeStreamsRefactoringProcessor.java
+++ b/edu.cuny.hunter.streamrefactoring.core/src/edu/cuny/hunter/streamrefactoring/core/refactorings/OptimizeStreamsRefactoringProcessor.java
@@ -150,6 +150,12 @@ public static void setLoggingLevel(int level) {
 
 	private boolean useImplicitTestEntrypoints = false;
 
+	private int numberOfMethodForStreamReturnType;
+
+	private int numberOfMethodForStreamParameter;
+
+	private int numberOfFieldForStream;
+
 	public OptimizeStreamsRefactoringProcessor() throws JavaModelException {
 		this(null, null, false, true, false, false, false, Optional.empty());
 	}
@@ -212,6 +218,12 @@ private RefactoringStatus checkExistence(IMember member, PreconditionFailure fai
 		return new RefactoringStatus();
 	}
 
+	private void setStatistics(int methodForStreamReturnType, int methodForStreamParameter, int fieldForStream) {
+		this.numberOfMethodForStreamReturnType = methodForStreamReturnType;
+		this.numberOfMethodForStreamParameter = methodForStreamParameter;
+		this.numberOfFieldForStream = fieldForStream;
+	}
+
 	@Override
 	public RefactoringStatus checkFinalConditions(final IProgressMonitor monitor, final CheckConditionsContext context)
 			throws CoreException, OperationCanceledException {
@@ -254,6 +266,9 @@ public RefactoringStatus checkFinalConditions(final IProgressMonitor monitor, fi
 					subMonitor.split(IProgressMonitor.UNKNOWN, SubMonitor.SUPPRESS_NONE));
 			subMonitor.worked(1);
 
+			this.setStatistics(analyzer.getNumberOfMethodForStreamReturnType(),
+					analyzer.getNumberOfMethodForStreamParameter(), analyzer.getNumberOfFieldForStream());
+
 			// set statistics for stream instances.
 			this.setNumberOfProcessedStreamInstances(analyzer.getNumberOfProcessedStreamInstances());
 			this.setNumberOfSkippedStreamInstances(analyzer.getNumberOfSkippedStreamInstances());
@@ -580,4 +595,16 @@ public void setUseImplicitJavaFXEntrypoints(boolean useImplicitJavaFXEntrypoints
 	public void setUseImplicitTestEntrypoints(boolean useImplicitTestEntrypoints) {
 		this.useImplicitTestEntrypoints = useImplicitTestEntrypoints;
 	}
+
+	public int getNumberOfMethodForStreamReturnType() {
+		return this.numberOfMethodForStreamReturnType;
+	}
+
+	public int getNumberOfMethodForStreamParameter() {
+		return this.numberOfMethodForStreamParameter;
+	}
+	
+	public int getNumberOfFieldForStream() {
+		return this.numberOfFieldForStream;
+	}
 }
diff --git a/edu.cuny.hunter.streamrefactoring.eval/src/edu/cuny/hunter/streamrefactoring/eval/handlers/EvaluateConvertToParallelStreamRefactoringHandler.java b/edu.cuny.hunter.streamrefactoring.eval/src/edu/cuny/hunter/streamrefactoring/eval/handlers/EvaluateConvertToParallelStreamRefactoringHandler.java
index eef51a54..da913e3c 100644
--- a/edu.cuny.hunter.streamrefactoring.eval/src/edu/cuny/hunter/streamrefactoring/eval/handlers/EvaluateConvertToParallelStreamRefactoringHandler.java
+++ b/edu.cuny.hunter.streamrefactoring.eval/src/edu/cuny/hunter/streamrefactoring/eval/handlers/EvaluateConvertToParallelStreamRefactoringHandler.java
@@ -339,6 +339,8 @@ public Object execute(ExecutionEvent event) throws ExecutionException {
 					resultsHeader.add(action.toString());
 
 				resultsHeader.add("time (s)");
+				resultsHeader.addAll(Arrays.asList("#methods for stream return type", "#methods for stream parameter",
+						"#number of fields for stream"));
 
 				resultsPrinter = createCSVPrinter("results.csv",
 						resultsHeader.toArray(new String[resultsHeader.size()]));
@@ -585,6 +587,10 @@ public Object execute(ExecutionEvent event) throws ExecutionException {
 					resultsPrinter.print((resultsTimeCollector.getCollectedTime()
 							- processor.getExcludedTimeCollector().getCollectedTime()) / 1000.0);
 
+					resultsPrinter.print(processor.getNumberOfMethodForStreamReturnType());
+					resultsPrinter.print(processor.getNumberOfMethodForStreamParameter());
+					resultsPrinter.print(processor.getNumberOfFieldForStream());
+
 					// end the record.
 					resultsPrinter.println();