Final answer:
Agile methodology, Waterfall methodology, and Iterative development are key approaches in project management.
Explanation:
Agile methodology, Waterfall methodology, and Iterative development are all common approaches in project management. Agile methods involve active customer participation, suitable for projects with uncertainty. Waterfall methods are more appropriate for stable projects with clear goals. Iterative methods involve repeated cycles of work, common in project management.
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