• A model of the constraints of project management. While its origins are unclear, the project management triangle has been used since at least the 1950s. It contends that 1) the quality of work is constrained by the project’s budget, deadlines, and scope (features); 2) the project manager can trade between constraints; and 3) changes in one constraint necessitate changes in others to compensate, or quality will suffer. “Good, fast, cheap. Choose two.” and similar statements are often used to encapsulate the triangle’s constraints concisely. ← Wikipedia

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