It is now clear that endlessly growing consumption of resources in the global human economy imperils Earth’s life-sustaining biosystem and threatens human existence as we know it. Long-term sustainability of human and non-human life can be achieved only by creating an entirely new economy that...

New product development involves making a series of decisions that transform vaguely defined customer needs and desires into a final product. Two important, but often overlooked, product development decisions are (1) the classification of requirements as mandatory or optional, and (2) the...