Waterfall

• Traditional approach used for over 40 years.

• Requirements must be defined at the start.

• Little / no alternations.

• Sequential - Complete 1 task and then the next.

• Used in large scale SW development where thorough planning and predictability is required.

Pros

• Extensive planning, this thoroughness often results in more accurate timelines and budgets.

Cons

• Difficult to apply changes or modify / correct previous steps