alfresco-community-repo/config/alfresco/workflow/parallelreview_group_processdefinition.xml

<?xml version="1.0" encoding="UTF-8"?>

<process-definition xmlns="urn:jbpm.org:jpdl-3.1" name="wf:parallelgroupreview">

    <swimlane name="initiator"></swimlane>

    <start-state name="start">
        <task name="wf:submitGroupReviewTask" swimlane="initiator" />
        <transition name="" to="startreview"/>
    </start-state>

    <node name="startreview">
        <action class="org.alfresco.repo.workflow.jbpm.ForEachFork">
            <foreach>#{people.getMembers(bpm_groupAssignee)}</foreach>
            <var>reviewer</var>
        </action>
        <event type="node-enter">
            <script>
                <variable name="wf_approveCount" access="write" />
                <expression>
                    wf_approveCount = 0;
                </expression>
            </script>
        </event>
        <transition name="review" to="review" />
    </node>

    <task-node name="review">
        <task name="wf:reviewTask">
            <assignment class="org.alfresco.repo.workflow.jbpm.AlfrescoAssignment">
               <actor>#{reviewer}</actor>
            </assignment>
        </task>
        <transition name="reject" to="endreview" />
        <transition name="approve" to="endreview">
            <script>
                <variable name="wf_approveCount" access="read,write" />
                <expression>
                    wf_approveCount = wf_approveCount +1;
                 </expression>
            </script>
        </transition>
    </task-node>

    <join name="endreview">
        <transition to="isapproved" />
    </join>

    <decision name="isapproved">
        <event type="node-enter">
           <action class="org.alfresco.repo.workflow.jbpm.AlfrescoJavaScript">
              <script>
                 <variable name="wf_reviewerCount" access="write"/>
                 <expression>people.getMembers(bpm_groupAssignee).length;</expression>
              </script>
           </action>
           <action class="org.alfresco.repo.workflow.jbpm.AlfrescoJavaScript">
              <script>
                 <variable name="wf_requiredPercent" access="write"/>
                 <expression>wf_requiredPercent = wf_requiredApprovePercent;</expression>
              </script>
           </action>
           <action class="org.alfresco.repo.workflow.jbpm.AlfrescoJavaScript">
              <script>
                 <variable name="wf_actualPercent" access="write"/>
                 <expression>wf_actualPercent = ((wf_approveCount * 100) / people.getMembers(bpm_groupAssignee).length);</expression>
              </script>
           </action>
        </event>
        <transition name="reject" to="rejected" />
        <transition name="approve" to="approved">
            <condition>#{wf_actualPercent >= wf_requiredApprovePercent}</condition>
        </transition>
    </decision>
               
    <task-node name="rejected">
        <task name="wf:rejectedParallelTask" swimlane="initiator" />
        <transition to="end" />
    </task-node>

    <task-node name="approved">
        <task name="wf:approvedParallelTask" swimlane="initiator" />
        <transition to="end" />
    </task-node>

    <end-state name="end"/>

</process-definition>