"The Quality 4P's Model Guidebook for Chapters 1 & 2" is a detailed look at the concepts of "Differentiation Bias" and "Singular and Secondary Designs" as presented in "The Quality 4P's Model Handbook." The reader will find it most beneficial if both books are in use, but "The Quality 4P's Model Guidebook for Chapters 1 & 2" is designed with quotes under discussion from "The Quality 4P's Model Handbook" for the sake of easy comprehension regarding the entire "Quality 4P's Model." (People, Processes, Product, and Price)