diff --git a/AlgebraicDataflowArchitectureModel/src/algorithm/DataStorageNecessity.java b/AlgebraicDataflowArchitectureModel/src/algorithm/DataStorageNecessity.java
index c9aac3e..d9dd69d 100644
--- a/AlgebraicDataflowArchitectureModel/src/algorithm/DataStorageNecessity.java
+++ b/AlgebraicDataflowArchitectureModel/src/algorithm/DataStorageNecessity.java
@@ -15,9 +15,6 @@
 				Expression nextexp = member.getStateTransition().getNextStateExpression();
 				boolean flag = false;
 				for (Position pos : curexp.getVariables().keySet()) {
-					System.out.println(curexp);
-					System.out.println(curexp.getVariables().containsKey(pos));
-					System.out.println(nextexp);
 					if (nextexp.contains(curexp.getVariables().get(pos))) {
 						flag = true;
 					}
diff --git a/AlgebraicDataflowArchitectureModel/src/algorithm/EdgeTransitionSelectable.java b/AlgebraicDataflowArchitectureModel/src/algorithm/EdgeTransitionSelectable.java
index 29e0563..d9268a0 100644
--- a/AlgebraicDataflowArchitectureModel/src/algorithm/EdgeTransitionSelectable.java
+++ b/AlgebraicDataflowArchitectureModel/src/algorithm/EdgeTransitionSelectable.java
@@ -1,5 +1,34 @@
 package algorithm;
 
-public class EdgeTransitionSelectable {
+import models.*;
+import models.dataFlowModel.*;
 
+public class EdgeTransitionSelectable {
+	static public void run(ResourceDependencyGraph graph) {
+		PushPullAttribute ppat = new PushPullAttribute();
+		ppat.addOption(PushPullValue.PUSHorPULL);
+		ppat.addOption(PushPullValue.PUSH);
+		ppat.addOption(PushPullValue.PULL);
+		for (Node n : graph.getNodes()) {
+			if (((StoreAttribute) ((ResourceNode) n).getAttribute()).isNeeded()) {
+				trackEdges(n);
+			}
+		}
+		for (Edge e : graph.getEdges()) {
+			if (((ResourceDependency) e).getAttribute() == null) {
+				((ResourceDependency) e).setAttribute(ppat);
+			}
+		}
+	}
+
+	static private void trackEdges(Node n) {
+		PushPullAttribute ppat = new PushPullAttribute();
+		ppat.addOption(PushPullValue.PUSH);
+		for (Node pre : n.getPredecessors()) {
+			for (Edge in : n.getInEdges()) {
+				((ResourceDependency) in).setAttribute(ppat);
+			}
+			trackEdges(pre);
+		}
+	}
 }
diff --git a/AlgebraicDataflowArchitectureModel/src/tests/DataStorageDecisionTest.java b/AlgebraicDataflowArchitectureModel/src/tests/DataStorageDecisionTest.java
new file mode 100644
index 0000000..319bca2
--- /dev/null
+++ b/AlgebraicDataflowArchitectureModel/src/tests/DataStorageDecisionTest.java
@@ -0,0 +1,5 @@
+package tests;
+
+public class DataStorageDecisionTest {
+
+}
diff --git a/AlgebraicDataflowArchitectureModel/src/tests/EdgeTransitionSelectableTest.java b/AlgebraicDataflowArchitectureModel/src/tests/EdgeTransitionSelectableTest.java
new file mode 100644
index 0000000..49c574c
--- /dev/null
+++ b/AlgebraicDataflowArchitectureModel/src/tests/EdgeTransitionSelectableTest.java
@@ -0,0 +1,5 @@
+package tests;
+
+public class EdgeTransitionSelectableTest {
+
+}