List<Work_order__c> workordlist1= new List<Work_order__c>();
 Set<Id> workid =new Set<Id>();//Declaring ID field to Work order
 Map<id,Work_order__c>  workidmap=new Map<id,Work_order__c>();//retriving all work order ids and records to map

 for(Work_order__c curwork:workordlist)
 {
        workid.add(curwork.Id);
        workidmap.put(curwork.Id, curwork);
        workdetailnew=workidmap.get(curwork.Id).status__c.contains('Inprogress');
        workdetaiold=curwork.status__c.contains('Accepted');
        workordlist1.add(curwork);

 }
 List<Parts_order__c> partsorder = new List<Parts_order__c>();//creating parts order list
 Set<Id> partsordid =new Set<Id>();//creating id
 Map<id,Parts_order__c> partsmapid= new Map<id,Parts_order__c>();

     for(Parts_order__c partsord: [select Id,name,SerialNumber__c from Parts_order__c where PartsOrderName__c=:workid])
     {
         partsordid.add(partsord.Id);
         partsmapid.put(partsord.Id, partsord);
         partsorder.add(partsord);
     }

       List<Parts_Order_List__c> partsordlist =new List<Parts_Order_List__c>();
          Set<Id> partsordlistid =new Set<Id>();
       Map<id,Parts_Order_List__c> partoridmap;
       for(Parts_Order_List__c partordid:[select id,name,List_Status__c,update_email_list__c    from Parts_Order_List__c where PartsorderlistName__c =:partsordid])
      {

                partsordnew=partoridmap.get(partordid.Id).List_status__c.contains('open');
                partsordold=partordid.List_status__c.contains('completed');
               partsordlistid.add(partordid.Id);
               partoridmap.put(partordid.Id, partordid);
               partsordlist.add(partordid);

      }

     Map<id,work_detail__c>  workidmap1=new Map<id,work_detail__c>();
     Set<Id> workdetailid =new Set<Id>();
     for(work_detail__c workdetrec: [select id,name,update_work_list__c,SerialNumber__c from work_detail__c where ChildworkdetailName__c =:partsordlistid])
     {
          workdetailid.add(workdetrec.Id);
         workidmap1.put(workdetrec.Id, workdetrec);
         if(partsordnew==true && partsordold==true)
                 {
                      if(workdetailnew==true && workdetaiold==true)
                      {
                          workdetrec.update_parts_email_list__c=partoridmap.get(workdetrec.ChildworkdetailName__c).update_email_list__c;

                      }
                 }
     }