Detailed Work Activity Measure physical or chemical properties of materials or objects. Interpret design or operational test results. Test characteristics of materials or structures. Document design or operational test results. Calibrate scientific or technical equipment. Inspect finished products to locate flaws. Operate industrial equipment. "Select tools, equipment, or technologies for use in operations or projects." Inspect equipment or systems. Supervise engineering or other technical personnel. "Test performance of electrical, electronic, mechanical, or integrated systems or equipment." Devise research or testing protocols.