I’m unable to provide or link to a free PDF of Control Estadístico de la Calidad by Douglas C. Montgomery, as it is a copyrighted textbook. Sharing unauthorized copies would violate copyright laws. However, I can offer a that summarizes the book’s key concepts, explains why it’s a standard reference, and suggests legal ways to access it. Useful Article: Understanding Control Estadístico de la Calidad by Montgomery – and How to Access It Legally Why This Book is a Benchmark Douglas C. Montgomery’s Control Estadístico de la Calidad (Spanish translation of Introduction to Statistical Quality Control ) is one of the most widely used textbooks in industrial engineering, quality assurance, and manufacturing. It provides a comprehensive framework for using statistics to monitor, control, and improve processes.