PM-6008 v5

Project Management Institute. (2017). A guide to the project management body of knowledge (PMBOK® Guide)–Sixth Edition: Vol. Sixth edition. Project Management Institute.
A Guide to the Project Management Body of Knowledge (PMBOK®Guide) is PMI's flagship publication and is a fundamental resource for effective project management in any industry.

• Review Chapter 8 Project Quality Management

Arab Momeni, M., Yaghoubi, S., & Aliha, M. R. M. (2019). An optimal control model for analyzing quality investment in the project management. Computers & Industrial Engineering, 129, 529–544.
This paper models the dynamic nature of the investment in the quality of projects and formulate the relationship between cost, time and quality of projects using the optimal control theory.