Production, including assembling, filling, measuring, mixing, testing and verifying performance in the manufacture of products; Test and repair, involving routine testing of assemblies and finished products, including interpretation of results and routine repairs; and. Work activities are focused on one or more areas of manufacturing operations support: Materials handling, involving physical and administrative tasks related to shipping, receiving, storing and distributing materials, parts, supplies and equipment; The highlighted part is the majority of what they would be tasked to do.