Iron Brigade and was previously called the "Black Hat" Brigade. The 3rd Brigade Combat Team, 1st Infantry Division was known as the Iron Brigade from its formation in 1917 through World War I, World War II and Vietnam, until some time in the early 2000s when, for reasons that are still unclear, the name was changed to Duke Brigade. The unit crest was an Iron Cross in a triangle, it appears that that was also changed. The 3rd Brigade of the 4th Infantry Division is also known as the Iron Brigade. Its unit crest is similar to the medals issued to veterans
Project management triangle Project management triangle The Project Management Triangle (called also the "Triple Constraint", "Iron Triangle" and "Project Triangle") is a model of the constraints of project management. While its origins are unclear, it has been used since at least the 1950s. It contends that: For example, a project can be completed faster by increasing budget or cutting scope. Similarly, increasing scope may require equivalent increases in budget and schedule. Cutting budget without adjusting schedule or scope will lead to lower quality. In practice, however, trading between constraints is not always possible. For example, throwing money (and people) at a fully staffed