Situation: Flavio's Organic Construction Company built a commercial building of entirely plant-based materials. Unfortunately, the final inspection found serious problems with the building's plumbing, and extensive non-plant-based renovations were required before the building could be sold to a customer. According to The Cost of Poor Quality, what category does this cost belong to?

Internal failure costs arise from defects identified before the product reaches the customer, requiring rework or corrections. The plumbing issues in Flavio’s building were detected during inspection, necessitating renovations prior to sale. RevOps principles emphasize tracking internal failures to improve processes, reduce waste, and optimize operational efficiency. Addressing these defects internally prevents revenue loss and protects customer satisfaction. Monitoring internal failure costs helps prioritize preventive actions and quality improvements.