Redução do índice de reclamações de um produto do segmento de cosméticos
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Abstract
The Brazilian cosmetics industry is characterized by strong competitiveness and a permanent need for innovation, demanding increasingly rigorous quality control practices to ensure sensory consistency, safety, and consumer satisfaction. In this context, the present study investigated the recurrence of customer complaints related to a leave-in hair product, whose main nonconformity reported by consumers was viscosity variation—an issue directly affecting product application, perceived performance, and overall user experience. The central objective was to analyze and eliminate the root cause of this problem, thereby reducing the complaint index and restoring product reliability. This applied research was conducted as a case study and employed data from customer service records (SAC), social media comments, e-commerce reviews, and laboratory-based physicochemical analyses. To structure the diagnostic process and guide corrective actions, the PDCA cycle was applied in conjunction with a Pareto Chart, Ishikawa Diagram, technical brainstorming sessions, and a 5W2H action plan. Stability tests and rheological measurements revealed that the original concentration of cetearyl alcohol (0.56%) caused a progressive increase in viscosity over time. Reformulation to 0.30%, combined with the standardization of operational and quality-control parameters, resulted in rheological stability across batches (90–400 cP), a reduction of more than 90% in customer complaints, and significant improvements in users’ perception of fluidity and sensory performance. Beyond resolving the nonconformity, the study highlights the importance of continuous monitoring, systematic cause analysis, and periodic revision of technical specifications as essential practices in cosmetic quality engineering. The findings demonstrate the effectiveness of the methodology applied and its potential for replication across other production processes and products with similar physicochemical behavior, contributing to standardization strategies, innovation management, and customer loyalty within the cosmetics sector.
