MEP (mechanical, electrical, plumbing) systems are integral parts of modern buildings. Adequate conception, design, and installation of MEP systems are an essential prerequisite for a successful project. Experience has shown that the practical implementation of this aspect is often a challenge for the involved project stakeholders due to the increasing complexity of MEP systems. This raises the question of whether the field of MEP engineering is particularly sensitive to potential conflicts and disruptions in complex construction projects compared to other trades. In order to investigate these questions, a survey based on a standardized questionnaire was carried out among Austrian experts with experience in large building construction projects. Overall, 515 experts participated in this survey, with 365 completely answering the questionnaire. The results show that the participants consider proper project integration of MEP engineering as a critical success factor in complex construction projects. They also show that inadequate consideration of this aspect poses a substantial risk for project disruptions.