Final answer:
The field on the Add Direct Scheduled Work Order screen in IWIMS that should not be changed without a valid customer requirement is the Service Type field.
Step-by-step explanation:
The field on the Add Direct Scheduled Work Order screen in IWIMS that should not be changed without a valid customer requirement is the Service Type field. This field specifies the type of service that needs to be performed, such as repairs, maintenance, or installation. Modifying this field without a valid customer requirement can lead to incorrect work orders being generated, causing confusion and inefficiency.
For example, if a customer requests a repair service and the Service Type field is changed to installation, the technician may receive incorrect instructions and perform the wrong task.
Therefore, it is important to ensure that the Service Type field is only modified when there is a valid customer requirement that aligns with the requested service.