On the other hand, many of the non-conformities observed in the during inspections are due to the lack of information of building builders and owners about the relevant requirements and standards. Therefore, in this regard, by obtaining inspection services from capable and experienced inspection companies in the pre-installation stage and observing the relevant requirements such as elevator shaft conditions, elevator shaft conditions, engine and pulley room installation conditions, passageway conditions and other sections Elevator related prevented problems, rework, demolition and repairs, re-costs, waste of time, etc.