In aviation maitenance, tool control is of great concern. A way this is combated is tool foaming (aka Shadow Foaming). At a glance, this provides technicians assurance that their tools are accounted for. 

The advent of additive manufacture has changed the approach that can be taken for prototyping and has opened the doors for low-scale fabrication. In a few hours, from a desk a design revision can be manifested, allowing for rapid revision and fewer in-production errors.