What is the World Health Organization’s (WHO’s) definition of engineering methods, also known as engineering controls?

Homeostasis—The Importance of Being in Balance

When many people think of homeostasis they think of their body being in balance or the flight or flight response. Homeostasis is the maintenance of physiological conditions required to maintain the life of the organism. Cannon (1932) has come up with some theories on homeostasis. What are Cannon’s (1932) theories on homeostasis? What is the World Health Organization’s (WHO’s) definition of engineering methods, also known as engineering controls?