When do we have RE activities?

RE always evolved with engineering and existed since its dawn.

• It is frequently done informally by everyone in their daily lives.

Every time we look at a software/device/system and try to understand how it works or understand any aspect of its behavior and structure.

• Because we want to make a better one.

• Because we wish to estimate if it suits a purpose.

Every time we look at our code and try to find what it was supposed to do.

• Especially when there is no documentation.