Classic Mistake: Waterfall Model

It sucks, its popular, it's often used without realizing.

Big up-front design, nothing works until the end.

• Gather requirements, design, code, test, release.

• Very inflexible

• Requires firm requirements up-front

• Nothing has to work until the end.

• Early mistakes inflate exponentially and are invisible until the end.

• Has this strange idea that software has a "beginning" and an "end"