# Concepts

## Pages

- [Adaptive approach](https://projectmanagement.institute/concepts/adaptive-approach.md) — An approach that expects learning and change, using short feedback cycles to choose what to do next.
- [Agile](https://projectmanagement.institute/concepts/agile.md) — A movement and way of working that values people, usable results, collaboration, and responsiveness while using feedback to adapt under uncertainty.
- [Incremental](https://projectmanagement.institute/concepts/incremental.md) — Delivering a larger result as a sequence of smaller usable additions.
- [Iterative](https://projectmanagement.institute/concepts/iterative.md) — Revisiting and improving work through repeated feedback cycles.
- [Waterfall](https://projectmanagement.institute/concepts/waterfall.md) — A predictive approach in which work progresses through largely sequential phases based on substantial up-front definition.