The concept of 'shift left' during my IT education was drummed in rather hard. We were asked to look at design and development as two legs of a V with design going down the left leg and the build going up the right leg.

Problems or enhancement occurring at build stage (right leg) meant a project would have to return to the equivalent point on the design (left ) down leg, inccuring delay, cost, restart and knock on effects to the design at that point in the design leg. In other words greater cost and delay caused by reiteration. The principle lesson being, put the time and effort into getting the design right.

This principle serves us well for all types of projects.

Sula