Abstract: The present invention relates to a master resource planning systems and related methods for optimizing resource plans across multiple networks. In particular, the present invention optimizes constrained resources across multiple networks and produces an optimized plan to allocate and coordinate the obtaining, shipping and procurement of limited resources based upon user-defined strategies and supplier/shipper preferences Aspects of the disclosure include creating planning data and planning rules. Planning data contains information regarding constrained resources in the multiple networks. Planning rules are based on user-defined strategies. Additional aspects include generating a plan based on the planning data and the planning rules and revising the plan in real-time. The generated plan optimally allocates the constrained resources according to the user-defined strategies.