This presentation challenges misconceptions about propulsion system integrators (PSIs) in the marine industry. While PSIs provide high-performance equipment, they often fall short on full ship integration, leaving shipyards and vessel owners to address critical gaps. Many assume PSIs handle seamless system harmonization, but the reality is more fragmented. Through real-world examples and industry insights, this session highlights common integration pitfalls and offers practical strategies to mitigate delays and inefficiencies. Attendees will gain a clearer understanding of where integration challenges arise and how to proactively address them for smoother project execution.