Significant progress in production and information technologies and innovations in management of operations during the last couple of decades have made the production of small lots and deployment of Just-In-Time (JIT) concepts in flowshops possible. As a result, some researchers and practitioners have been seeking to improve the performance of non-repetitive systems using JIT concepts. In this process, the JIT concepts that were originally designed for mass production have been modified to adapt JIT to non-repetitive systems. This article uses a priority rule that is based on real-time demand and production information for sequencing jobs in a kanban-controlled flowshop. The analysis of the effect of this priority rule; the number of kanbans; the length of the withdrawal cycle; First-Come, First-Served (FCFS); and Shortest Processing Time (SPT) on four performance measures—customer wait time, total inventory, input stock-point inventory, and output stock-point inventory, shows that the use of this priority rule results in a significant reduction of customer wait time and a slight decrease in inventory.