What conclusions and challenges does Spiekermann draw for Value-based Engineering?

VbE cannot be outsourced to one department, must start in the early phases of innovation, costs time, money, cooperation and care for stakeholders, and its success cannot be measured precisely, so it requires a cultural change in management.

The cultural change: management moves from "only what is measurable is manageable" to "only what rests on shared values, and therefore on trust, is worth pursuing", even if that trust cannot be measured.