Aero pitot-static pressure systemtester has direct effects on the airtightness of the air - borne pitot - static pressure system and the accuracy of meter reading.
全静压系统检查仪对飞机上该系统的气密性与仪表指示的准确性有直接影响。
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But Petschenik's intended audience isn't the systemtester. It is the unit tester, the functional tester, the systemtester, the developer, the project manager, product manager, etc.
Unlike the developers, who are responsible for a specific function or component, the tester understands how the system works as a whole to accomplish customer goals.