In this paper, a simulation study was carried out to improve the productivity of a fully automatic bottle-filling production system. An in-depth analysis of the system was performed in an attempt to increase its throughput and overall productivity. A simulation model was developed for the current system to ascertain its limitations and problems. The relevant performance measures are analyzed and a set of changes and improvements to the actual system were proposed. Furthermore, an optimization study on the relevant parameters was conducted in order to find the values that lead to increased productivity and throughput. In addition, downtime analysis was performed using statistical techniques to optimize uptime and reduce machine failures. Simple actions were suggested which can lead to considerable increase in efficiency, productivity and profitability of the system.