1. A method comprising: storing, by a non-transitory computer-readable data storage device, vehicle service request (VSR) data collected from a plurality of vehicle service requests pertaining to vehicles of a first vehicle type identified by a first common vehicle identification, wherein the plurality of vehicle service requests include date-of-service indicators for determining one or more time periods associated with each vehicle service request; generating, by a processor, a first VSR data baseline based on a first quantity of multiple vehicles of the first vehicle type that the VSR data indicates exhibited a common symptom and were fixed by a common repair during a first time period; generating, by the processor, a second VSR data baseline based on a second quantity of multiple vehicles of the first vehicle type that the VSR data indicates exhibited the common symptom and were fixed by the common repair during a second time period; detecting, by the processor, a first deviation in the second VSR data baseline with respect to the first VSR data baseline; and providing, by the processor, a notification identifying the first deviation.