This is a process about Maintenance Management Process.
There are two pools , one is for Customer , the other is for Service.
For Customer, the customer need fill up the Maintenance Form , then commit it to Service.
For Service,there are three roles , Receptionst(jack) , Maintainer(james) , Finance(john) . First , the Receptionst receive the maintain request , check the form , then send the task to Maintainer ; Then , the Maintainer get the maintain task , when he completes the task , he will check the Maintain Completed checkbox, then the process will go to Finance to account the bill, else it will go back to Receptionst to confirm Maintenance Unsuccessful.