A method and system (2, 30) for quality assurance of on or in a building (4) provided or to be provided service services, said system (2, 30) a central processing unit (6), a first mobile user terminal (8), a wherein power directory is received at the first mobile user terminal (8) and processed, generates a machining protocol and to a second user terminal (24, 26) is transmitted and a personalized login process by the second user terminal (24, 26) is only confirmed as successful and is completed when a user input is received regarding a confirmation of the processing protocol.
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