diff --git a/bpmn/MSOInfrastructureBPMN/src/main/groovy/org/openecomp/mso/bpmn/infrastructure/scripts/DoCompareModelVersions.groovy b/bpmn/MSOInfrastructureBPMN/src/main/groovy/org/openecomp/mso/bpmn/infrastructure/scripts/DoCompareModelVersions.groovy
new file mode 100644
index 0000000..a8af52a
--- /dev/null
+++ b/bpmn/MSOInfrastructureBPMN/src/main/groovy/org/openecomp/mso/bpmn/infrastructure/scripts/DoCompareModelVersions.groovy
@@ -0,0 +1,255 @@
+/*-
+ * ============LICENSE_START=======================================================
+ * ONAP - SO
+ * ================================================================================
+ * Copyright (C) 2018 Huawei Technologies Co., Ltd. All rights reserved. 
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ * 
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ * ============LICENSE_END=========================================================
+ */
+package org.openecomp.mso.bpmn.infrastructure.scripts;
+
+import static org.apache.commons.lang3.StringUtils.*;
+import groovy.xml.XmlUtil
+import groovy.json.*
+
+import org.openecomp.mso.bpmn.core.domain.ServiceDecomposition
+import org.openecomp.mso.bpmn.core.domain.ServiceInstance
+import org.openecomp.mso.bpmn.core.domain.ModelInfo
+import org.openecomp.mso.bpmn.core.domain.Resource
+import org.openecomp.mso.bpmn.core.domain.AllottedResource
+import org.openecomp.mso.bpmn.core.domain.NetworkResource
+import org.openecomp.mso.bpmn.core.domain.VnfResource
+import org.openecomp.mso.bpmn.common.recipe.ResourceInput
+import org.openecomp.mso.bpmn.common.recipe.BpmnRestClient
+import org.openecomp.mso.bpmn.core.json.JsonUtils
+import org.openecomp.mso.bpmn.common.scripts.AaiUtil
+import org.openecomp.mso.bpmn.common.scripts.AbstractServiceTaskProcessor
+import org.openecomp.mso.bpmn.common.scripts.ExceptionUtil
+import org.openecomp.mso.bpmn.common.scripts.SDNCAdapterUtils
+import org.openecomp.mso.bpmn.common.scripts.CatalogDbUtils;
+import org.openecomp.mso.bpmn.core.RollbackData
+import org.openecomp.mso.bpmn.core.WorkflowException
+import org.openecomp.mso.rest.APIResponse;
+import org.openecomp.mso.rest.RESTClient
+import org.openecomp.mso.rest.RESTConfig
+
+import java.util.List;
+import java.util.UUID;
+
+import javax.mail.Quota.Resource;
+
+import org.camunda.bpm.engine.delegate.BpmnError
+import org.camunda.bpm.engine.runtime.Execution
+import org.json.JSONObject;
+import org.json.JSONArray;
+import org.apache.commons.lang3.*
+import org.apache.commons.codec.binary.Base64;
+import org.springframework.web.util.UriUtils;
+
+/**
+ * This groovy class supports the <class>DoCompareModelVersions.bpmn</class> process.
+ *
+ * Inputs:
+ * @param - model-invariant-id-target
+ * @param - model-version-id-target
+ * @param - model-invariant-id-original
+ * @param - model-version-id-original
+ *
+ * Outputs:
+ * @param - addResourceList
+ * @param - delResourceList
+ *
+ */
+public class DoCompareModelVersions extends AbstractServiceTaskProcessor {
+
+	String Prefix="DCMPMDV_"
+	ExceptionUtil exceptionUtil = new ExceptionUtil()
+	JsonUtils jsonUtil = new JsonUtils()
+	CatalogDbUtils cutils = new CatalogDbUtils()
+
+	public void preProcessRequest (Execution execution) {
+		def isDebugEnabled = execution.getVariable("isDebugLogEnabled")
+		String msg = ""
+		utils.log("INFO"," ***** preProcessRequest *****",  isDebugEnabled)
+
+		try {
+			execution.setVariable("prefix", Prefix)
+			
+			//Inputs
+			String modelInvariantUuid_target = execution.getVariable("model-invariant-id-target")
+			if (isBlank(modelInvariantUuid_target)) {
+				msg = "Input model-invariant-id-target is null"
+				utils.log("INFO", msg, isDebugEnabled)
+				exceptionUtil.buildAndThrowWorkflowException(execution, 500, msg)
+			}			
+			
+            String modelUuid_target = execution.getVariable("model-version-id-target")
+            if (isBlank(modelUuid_target)) {
+				msg = "Input model-version-id-target is null"
+				utils.log("INFO", msg, isDebugEnabled)
+				exceptionUtil.buildAndThrowWorkflowException(execution, 500, msg)
+			}
+            
+            String modelInvariantUuid_original = execution.getVariable("model-invariant-id-original")
+            if (isBlank(modelInvariantUuid_original)) {
+				msg = "Input model-invariant-id-original is null"
+				utils.log("INFO", msg, isDebugEnabled)
+				exceptionUtil.buildAndThrowWorkflowException(execution, 500, msg)
+			}
+            
+            String modelUuid_original = execution.getVariable("model-version-id-original")
+            if (isBlank(modelUuid_original)) {
+				msg = "Input model-version-id-original is null"
+				utils.log("INFO", msg, isDebugEnabled)
+				exceptionUtil.buildAndThrowWorkflowException(execution, 500, msg)
+			}  
+			
+			// Target and original modelInvariantUuid must to be the same
+			if(modelInvariantUuid_target != modelInvariantUuid_original){
+				msg = "Input model-invariant-id-target and model-invariant-id-original must to be the same"
+				utils.log("INFO", msg, isDebugEnabled)
+				exceptionUtil.buildAndThrowWorkflowException(execution, 500, msg)      
+			}
+			
+			// Target and original modelUuid must not to be the same
+			if(modelUuid_target == modelUuid_original){
+				msg = "Input model-version-id-target and model-version-id-original must not to be the same"
+				utils.log("INFO", msg, isDebugEnabled)
+				exceptionUtil.buildAndThrowWorkflowException(execution, 500, msg)      
+			}
+
+		} catch (Exception ex){
+			msg = "Exception in preProcessRequest " + ex.getMessage()
+			utils.log("INFO", msg, isDebugEnabled)
+			exceptionUtil.buildAndThrowWorkflowException(execution, 7000, msg)
+		}
+		utils.log("INFO"," ***** Exit preProcessRequest *****",  isDebugEnabled)
+	}
+	
+   public void prepareDecomposeService_Target(Execution execution) {
+        def isDebugEnabled=execution.getVariable("isDebugLogEnabled")
+
+        try {
+            utils.log("DEBUG", " ***** Inside prepareDecomposeService_Target of update generic e2e service ***** ", isDebugEnabled)
+            String modelInvariantUuid = execution.getVariable("model-invariant-id-target")
+            String modelUuid = execution.getVariable("model-version-id-target")
+            //here modelVersion is not set, we use modelUuid to decompose the service.
+            String serviceModelInfo = """{
+            "modelInvariantUuid":"${modelInvariantUuid}",
+            "modelUuid":"${modelUuid}",
+            "modelVersion":""
+             }"""
+            execution.setVariable("serviceModelInfo", serviceModelInfo)
+            execution.setVariable("serviceModelInfo_Target", serviceModelInfo)
+
+            utils.log("DEBUG", " ***** Completed prepareDecomposeService_Target of update generic e2e service ***** ", isDebugEnabled)
+        } catch (Exception ex) {
+            // try error in method block
+            String exceptionMessage = "Bpmn error encountered in update generic e2e service flow. Unexpected Error from method prepareDecomposeService_Target() - " + ex.getMessage()
+            exceptionUtil.buildAndThrowWorkflowException(execution, 7000, exceptionMessage)
+        }
+     }
+
+    public void processDecomposition_Target(Execution execution) {
+        def isDebugEnabled=execution.getVariable("isDebugLogEnabled")
+    
+        utils.log("DEBUG", " ***** Inside processDecomposition_Target() of update generic e2e service flow ***** ", isDebugEnabled)    
+        try {
+            ServiceDecomposition serviceDecomposition = execution.getVariable("serviceDecomposition")
+            execution.setVariable("serviceDecomposition_Target", serviceDecomposition)
+        } catch (Exception ex) {
+            String exceptionMessage = "Bpmn error encountered in update generic e2e service flow. Unexpected Error from method processDecomposition_Target() - " + ex.getMessage()
+            utils.log("DEBUG", exceptionMessage, isDebugEnabled)
+            exceptionUtil.buildAndThrowWorkflowException(execution, 7000, exceptionMessage)
+        }
+    }
+ 
+   public void prepareDecomposeService_Original(Execution execution) {
+        def isDebugEnabled=execution.getVariable("isDebugLogEnabled")
+
+        try {
+            utils.log("DEBUG", " ***** Inside prepareDecomposeService_Original of update generic e2e service ***** ", isDebugEnabled)
+            String modelInvariantUuid = execution.getVariable("model-invariant-id-original")
+            String modelUuid = execution.getVariable("model-version-id-original")
+            //here modelVersion is not set, we use modelUuid to decompose the service.
+            String serviceModelInfo = """{
+            "modelInvariantUuid":"${modelInvariantUuid}",
+            "modelUuid":"${modelUuid}",
+            "modelVersion":""
+             }"""
+            execution.setVariable("serviceModelInfo", serviceModelInfo)
+            execution.setVariable("serviceModelInfo_Original", serviceModelInfo)
+
+            utils.log("DEBUG", " ***** Completed prepareDecomposeService_Original of update generic e2e service ***** ", isDebugEnabled)
+        } catch (Exception ex) {
+            // try error in method block
+            String exceptionMessage = "Bpmn error encountered in update generic e2e service flow. Unexpected Error from method prepareDecomposeService_Original() - " + ex.getMessage()
+            exceptionUtil.buildAndThrowWorkflowException(execution, 7000, exceptionMessage)
+        }
+     }
+
+    public void processDecomposition_Original(Execution execution) {
+        def isDebugEnabled=execution.getVariable("isDebugLogEnabled")
+    
+        utils.log("DEBUG", " ***** Inside processDecomposition_Original() of update generic e2e service flow ***** ", isDebugEnabled)    
+        try {
+            ServiceDecomposition serviceDecomposition = execution.getVariable("serviceDecomposition")
+            execution.setVariable("serviceDecomposition_Original", serviceDecomposition)
+        } catch (Exception ex) {
+            String exceptionMessage = "Bpmn error encountered in update generic e2e service flow. processDecomposition_Original() - " + ex.getMessage()
+            utils.log("DEBUG", exceptionMessage, isDebugEnabled)
+            exceptionUtil.buildAndThrowWorkflowException(execution, 7000, exceptionMessage)
+        }
+    } 	
+
+	public void doCompareModelVersions(execution){
+	    def isDebugEnabled=execution.getVariable("isDebugLogEnabled")
+        utils.log("INFO", "======== Start doCompareModelVersions Process ======== ", isDebugEnabled)          
+
+        ServiceDecomposition serviceDecomposition_Target = execution.getVariable("serviceDecomposition_Target")
+        ServiceDecomposition serviceDecomposition_Original = execution.getVariable("serviceDecomposition_Original")
+        
+        List<Resource> allSR_target = serviceDecomposition_Target.getServiceResources();
+        List<Resource> allSR_original = serviceDecomposition_Original.getServiceResources();
+        
+        List<Resource> addedResource = new ArrayList<String>()
+        List<Resource> delResource = new ArrayList<String>()
+        
+        addResourceList.addAll(allSR_target)
+        delResourceList.addAll(allSR_original)
+        
+        //Compare
+        for (Resource rc_t : allSR_target){
+            String muuid = rc_t.getModelInfo().getModelUuid()
+            String mIuuid = rc_t.getModelInfo().getModelInvariantUuid()
+            String mCuuid = rc_t.getModelInfo().getModelCustomizationUuid()
+            for (Resource rc_o : allSR_original){
+                if(rc_o.getModelInfo().getModelUuid() == muuid 
+                && rc_o.getModelInfo().getModelInvariantUuid() == mIuuid 
+                && rc_o.getModelInfo().getModelCustomizationUuid() == mCuuid) {
+                    addResourceList.remove(rc_t);
+                    delResourceList.remove(rc_o);
+                }
+            }         
+        }
+
+        execution.setVariable("addResourceList", addResourceList)
+        execution.setVariable("delResourceList", delResourceList)
+        utils.log("INFO", "addResourceList: " + addResourceList, isDebugEnabled)  
+        utils.log("INFO", "delResourceList: " + delResourceList, isDebugEnabled)
+        
+        utils.log("INFO", "======== COMPLETED doCompareModelVersions Process ======== ", isDebugEnabled)  
+	}
+
+}