CFD — Computational fluid dynamics Chronic claim — a claim that has been received repeatedly by the type of defect by any business unit, namely: periodically/regularly recurring product quality claim for a long time, which cannot be resolved within the framework of the standard an interfunctional VRT-Veriability Reduction Team is formed, whose task is to comprehensively determine the causes of the problem, develop measures to contain, eliminate and prevent the problem of replication at all production facilities of UC RUSAL.