What is Fixed is referring to the PRIORITY a service is given over a booking.
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Meaning if you determine the service as Fixed, the system will block the availability of that service in the programmed dates, as well as block the delivery of the car if the service is action.
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If the service is left NonFixed then the booking has priority over the service. This means that for example if you consider that taking a car to preventive maintenance can delay some days and want to prioritise a booking, the system will create the booking and move the service to the date in which the booking finalizes.
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