Lingo Explained : Greenfield vs Brownfield

Greenfield
A greenfield deployment is an installation and/or configuration where none has existed before. So you start building from scratch
green_field_wallpaper-wide

Brownfield
A brownfield deployment, in contrast, is an upgrade or addition to an existing infrastructure and uses some legacy components.
brownfield

So as an architect, I can say that the number of greenfield implementations in the field are very limited!

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