MANAGEMENT

Detailed explanation-1: -The term comes from real estate, where it conveys the image of a literal green-field site for development, undisturbed by previous construction. Product managers use greenfield to describe developing a new product, as opposed to enhancing or building on an existing product.

Detailed explanation-2: -Literal examples of greenfield projects are new factories, power plants, airports which are built from scratch on greenfield land. Those facilities which are modified/upgraded are called brownfield land projects (often the pre-existing site/facilities are contaminated/polluted.)

Detailed explanation-3: -A greenfield project is one that lacks constraints imposed by prior work on the site. Typically, what a greenfield project entails is development on a completely vacant site. Architects start completely from scratch. A brownfield project is one that carries constraints related to the current state of the site.