diff --git a/jsprit-io/src/main/java/com/graphhopper/jsprit/io/algorithm/VehicleRoutingAlgorithms.java b/jsprit-io/src/main/java/com/graphhopper/jsprit/io/algorithm/VehicleRoutingAlgorithms.java
index 3bc3800a..6f6aae04 100644
--- a/jsprit-io/src/main/java/com/graphhopper/jsprit/io/algorithm/VehicleRoutingAlgorithms.java
+++ b/jsprit-io/src/main/java/com/graphhopper/jsprit/io/algorithm/VehicleRoutingAlgorithms.java
@@ -889,8 +889,13 @@ public class VehicleRoutingAlgorithms {
                 ruin = getRadialRuin(vrp, routeStates, definedClasses, ruinKey, shareToRuin, jobDistance);
             } else if (ruin_name.equals("clusterRuin")) {
                 String initialNumberJobsToRemoveString = moduleConfig.getString("ruin.initRemoveJobs");
-                if (initialNumberJobsToRemoveString == null) throw new IllegalStateException("module.ruin.initRemoveJobs is missing.");
-                int initialNumberJobsToRemove = Integer.valueOf(initialNumberJobsToRemoveString);
+                String shareFactor = moduleConfig.getString("ruin.share");
+                int initialNumberJobsToRemove;
+                if (initialNumberJobsToRemoveString != null)
+                    initialNumberJobsToRemove = Integer.valueOf(initialNumberJobsToRemoveString);
+                else if(shareFactor != null)
+                    initialNumberJobsToRemove = (int) (Double.valueOf(shareFactor) * vrp.getJobs().size());
+                else throw new IllegalStateException("module.ruin.initRemoveJobs is missing.");
                 ruin = getClusterRuin(vrp, routeStates, definedClasses, ruinKey, initialNumberJobsToRemove);
             } else throw new IllegalStateException("ruin[@name] " + ruin_name + " is not known. Use either randomRuin or radialRuin.");