Final answer:
The stage-gate development funnel is a technique used to select the best design concept for product implementation by evaluating constraints and criteria, thus aiding in efficient resource allocation.
Step-by-step explanation:
The technique that forces managers to choose among competing projects so that functional resources are not spread thinly over too many projects is known as the stage-gate development funnel. This process evaluates potential designs relative to the constraints and criteria, requiring that the constraints be met. It also ensures the selection of the best design according to these criteria. The stage-gate development funnel is part of a structured decision process that evaluates each design concept to see if it meets the necessary constraints and compares them using certain criteria. The concept that best meets the criteria is then selected for product implementation. This technique helps maintain a focus on the most promising projects, thus optimizing resource allocation and increasing the chance of project success.