The purpose of the process is to transfer orders out of the production activity control system. This includes relieving shop floor personnel of responsibility for the orders and providing the system with information to evaluate performance.
The process is finished when the order has been closed and the appropriate actions performed.
Before the process can be started the order must be completed on the shop floor, with the exception of orders with maintenance objects that are to be scrapped.
The diagram below indicates the activities involved in work order closure.
Select Work Orders
'Work Order. Open' (MOS100) is used to select the work orders that have been completed and are ready to be closed. To approve work orders, all operations must be reported (status 90).
Orders can not be closed until all services are approved. Services are approved either manually or automatically. Services are set in 'Service. Connect to Facility' (MOS301/E). Manual approval is done in 'Equipment. Open Service History'. (MOS180). For services with automatic approval, the service is approved when the last operation for the order is reported.
In addition to approving the service, warranty information can be entered for both internal work order and external repair orders. Once approved, the status of the service history record is updated to 70 (approved), the status of the work order 85 and the status of the maintenance object is updated to 20 (serviceable).
After the services have been approved, the service meters are updated. The service meters are recorded in 'Serialized Item. Open Service Status' (MMS242). Here, a transaction is created each time the service is performed. The transaction indicates the date the service was last performed as well as the meter value. The meter value is used by the system to calculate when the service must be performed again.
Defer Work Order
Despite actions taken to complete orders, it is sometimes necessary to defer a work order. By using option 'Defer work order' in 'Work Order. Open' (MOS100), a new work request is created based on the work order you want to defer. After deferral, the status is updated to 80 (Deferred) and a work request is generated with status 20.
If the work order is merged (if it consists of several services), you must instead defer the services that the work order refers to by selecting option 'Defer service' in 'Equipment. Open Service History' (MOS180).
If the work order is connected to a complaint, 'Complaint. Open' (MOS500) is used to close the complaint.
Update Modification Status
'Serialized Item. Update Modif Status' (MOS184) is displayed when a service is connected to an engineering order. When the modification status is updated, the information is updated in 'Eng Order. Open Component Modif Ref' (MOS212).
When the item number or serial number is changed, 'Balance Identity. Reclassify' (MMS130) is displayed. An automatic check ensures that the combination item - serial number does not already exist before the item is reclassified.
Issue Approval Tag
Airworthiness Approval Tags are issued to ensure the airworthiness and eligibility status of parts after manufacture or to release maintenance work carried out on parts or components.
'Approval Tag. Open' (COS210) is used to create and make any changes or additions to an approval tag before it is printed. For each approval tag, it is possible to enter status/work text as well as include new part or alias numbers.
Print Approval Tag
Once all the information has been registered, the Approval Tag may be printed.
Close Work Order
Work orders are closed in 'Work Order. Close' (MOS050). When closing a work order there are four different outcomes; the work order is closed; the order is closed and the maintenance object is scrapped, returned to stock or returned to service. Each of these is described below:
In this, the simplest of cases, the work order is closed without creating any stock transactions. This is normal, for example when a work order only refers to an inspection.
When a maintenance object is scrapped, there are two alternatives. The object can be completely deleted from the system (scrap code 1), or the object can be scrapped and placed into an obsolete stock (scrap code 2).
This means that the maintenance object is to be returned to stock. The warehouse and location are specified when closing the work order creating a stock transaction. Once the stock transaction is made, the object is found in the inventory balance for the warehouse.
The last alternative is that the maintenance object is returned to service and installed in the assembly or aircraft. When an object is installed, a check is made to ensure that the object has the correct status and that it can be installed in the object according to 'Position. Connect Components' (MOS450) and 'Model/Site. Open Component Combinations' (MOS460).
After the transaction has been made, the object will be included in the next higher assembly (for example engine or aircraft). This can be checked in 'As-Built Structure. Display' (MOS253).