.. _magic_triangle:

Magic Triangle (Project Management Triangle)

Projects are constraint by three (plus one) attributes: - cost - scope / features - schedule - (quality)

The attributes cost, scope and schedule represent the corners of the triangle. The attribute quality represents the area which is span by the triangle.

Problem:

expecting a constant quality, one of the other attributes can not be changed without affecting the others (e.g. scope increases/decreases -> cost or schedule increases/decreases)

Resulting context:
 
  • expecting a constant quality the following combinations are possible: - Fast and Much (not Cheap) - Fast and Cheap (not Much) - Much and Cheap (not Fast)
  • ... or if quality is included in scope/features the following combinations are possible: - Fast and Good (not Cheap) - Fast and Cheap (not Good) - Good and Cheap (not Fast)