Validation of a Key Performance Indicator Framework Demonstrating Economic Benefits Gained through Resolving Nautical Bottlenecks on Selected Sections of the Danube

Addressing nautical bottlenecks is crucial for optimizing the utilization of inland waterways and maximizing the economic benefits of transports. To maximize economic benefits, a study was conducted to validate a key performance indicator (KPI)-based framework. This framework offers a structured approach to assessing the impact of resolved nautical bottlenecks on the economic benefits of inland waterway transport (IWT). To validate the applicability of the KPI framework, interviews with eleven experts were conducted. The goal was to prioritize each KPI based on their insights. The results of the interviews shed light on the relevance and coherence of both the individual KPIs and the overall KPI framework. The experts confirmed the importance of measures related to transportation efficiency, such as reduced transit times, increased vessel throughput, and enhanced reliability. The validated KPI-based framework serves as a valuable tool for policymakers, industry stakeholders, and researchers. It enables the assessment of the effects of resolving nautical bottlenecks in inland waterway systems. Future research should focus on quantifying the multifaceted impacts, making this framework even more useful for decision-making processes concerning investments in infrastructure upgrades and maintenance.