Cross-organisational workflows involve multiple concurrent, collaborative workflows across different departments or organisations, needing effective coordination due to their interdependent nature and shared resource requirements. The complexity of designing and managing these workflows stems from the need for comprehensive domain knowledge and a unified understanding of task dependencies and resource allocation. This paper introduces \({\textsc {Easy}}\mathcal {R}{\textsc {pl}}\) , a web-based tool suite designed to manage cross-organisational workflows. \({\textsc {Easy}}\mathcal {R}{\textsc {pl}}\) consists of a simulator for visualising the impact of workflow changes, a peak resource analysis for identifying potential resource bottlenecks, and a time analysis for estimating execution time. These tools assist planners with detailed insights to optimise workflow efficiency and minimise disruptions, enhancing the management of complex, interdependent workflows.