diff --git a/jsprit-core/src/main/java/jsprit/core/algorithm/box/InsertionNoiseMaker.java b/jsprit-core/src/main/java/jsprit/core/algorithm/box/InsertionNoiseMaker.java
new file mode 100644
index 00000000..4228bfa0
--- /dev/null
+++ b/jsprit-core/src/main/java/jsprit/core/algorithm/box/InsertionNoiseMaker.java
@@ -0,0 +1,61 @@
+package jsprit.core.algorithm.box;
+
+import jsprit.core.algorithm.listener.IterationStartsListener;
+import jsprit.core.problem.VehicleRoutingProblem;
+import jsprit.core.problem.constraint.SoftActivityConstraint;
+import jsprit.core.problem.misc.JobInsertionContext;
+import jsprit.core.problem.solution.VehicleRoutingProblemSolution;
+import jsprit.core.problem.solution.route.activity.TourActivity;
+import jsprit.core.util.RandomNumberGeneration;
+
+import java.util.Collection;
+import java.util.Random;
+
+/**
+ * Created by schroeder on 16/01/15.
+ */
+class InsertionNoiseMaker implements SoftActivityConstraint, IterationStartsListener {
+
+    private final double noiseProbability;
+
+    private boolean makeNoise = false;
+
+    private double noiseLevel = 0.1;
+
+    private Random random = RandomNumberGeneration.newInstance();
+
+//    private Random[] randomArray;
+
+    private double maxCosts;
+
+    InsertionNoiseMaker(VehicleRoutingProblem vrp, double maxCosts, double noiseLevel, double noiseProbability) {
+        this.noiseLevel = noiseLevel;
+        this.noiseProbability = noiseProbability;
+        this.maxCosts = maxCosts;
+//        randomArray = new Random[vrp.getNuActivities() + 2];
+//        for (int i = 0; i < randomArray.length; i++) {
+//            Random r = new Random();
+//            r.setSeed(random.nextLong());
+//            randomArray[i] = r;
+//        }
+    }
+
+    @Override
+    public void informIterationStarts(int i, VehicleRoutingProblem problem, Collection<VehicleRoutingProblemSolution> solutions) {
+        if (random.nextDouble() < noiseProbability) {
+            makeNoise = true;
+        } else makeNoise = false;
+    }
+
+    @Override
+    public double getCosts(JobInsertionContext iFacts, TourActivity prevAct, TourActivity newAct, TourActivity nextAct, double prevActDepTime) {
+        if (makeNoise) {
+            return noiseLevel * maxCosts * random.nextDouble();
+        }
+        return 0;
+    }
+
+    public void setRandom(Random random) {
+        this.random = random;
+    }
+}
diff --git a/jsprit-core/src/main/java/jsprit/core/algorithm/box/Jsprit.java b/jsprit-core/src/main/java/jsprit/core/algorithm/box/Jsprit.java
index 3ea705e3..3a13395b 100644
--- a/jsprit-core/src/main/java/jsprit/core/algorithm/box/Jsprit.java
+++ b/jsprit-core/src/main/java/jsprit/core/algorithm/box/Jsprit.java
@@ -327,11 +327,18 @@ public class Jsprit {
         final double maxCosts = jobNeighborhoods.getMaxDistance();
 
         IterationStartsListener noiseConfigurator;
-
-        ConcurrentInsertionNoiseMaker noiseMaker = new ConcurrentInsertionNoiseMaker(vrp, maxCosts, noiseLevel, noiseProbability);
-        noiseMaker.setRandom(random);
-        constraintManager.addConstraint(noiseMaker);
-        noiseConfigurator = noiseMaker;
+        if(noThreads > 1) {
+            ConcurrentInsertionNoiseMaker noiseMaker = new ConcurrentInsertionNoiseMaker(vrp, maxCosts, noiseLevel, noiseProbability);
+            noiseMaker.setRandom(random);
+            constraintManager.addConstraint(noiseMaker);
+            noiseConfigurator = noiseMaker;
+        }
+        else {
+            InsertionNoiseMaker noiseMaker = new InsertionNoiseMaker(vrp, maxCosts, noiseLevel, noiseProbability);
+            noiseMaker.setRandom(random);
+            constraintManager.addConstraint(noiseMaker);
+            noiseConfigurator = noiseMaker;
+        }
 
         RuinRadial radial = new RuinRadial(vrp, vrp.getJobs().size(), jobNeighborhoods);
         radial.setRandom(random);