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Although Causal Analysis and Resolution (CAR) is staged at Level 5 of the CMMI, it is a useful compendium of good practices for a company that starts its process improvement road. This mapping is designed to help organizations perform CAR at all levels. Borrowing from the defunct "advanced practices" paradigm, it describes what the practice would be like at different levels of capability within the process area. For example, almost all practices are described for capability level 1, thus providing guidance on how to start preventing defects from recurring.