Vehicle Dependability Study (VDS)The Vehicle Dependability Study (VDS) examines issues reported by original owners of 3-year-old vehicles. This study measures car reliability by analyzing problems experienced over the past 12 months of ownership.
Initial Quality Study (IQS)The Initial Quality Study (IQS) examines issues experienced within the first 90 days of new-vehicle ownership. This study measures car quality by analyzing problems reported in the mechanical quality and design of areas such as powertrain, body and interior, and features and accessories.
Automotive Performance, Execution, and Layout (APEAL) StudyAutomotive Performance, Execution and Layout (APEAL) Study, this measure examines what consumers like about their new vehicles after 90 days of ownership.