This research aims at providing a quantitative benefits assessment of enhancing the visibility in global supply chains. In particular, we describe how we model physical and information processes in a global maritime supply chain, and how delays propagate under different information scenarios. We describe how the model logic is validated in the context of a large scale project in which amongst others, port operators, shippers, customs, and logistics service providers are involved. Preliminary simulation results indicate how different response measures impact the extent and number of delays in the system.