The increasing complexity of production systems and the need to ensure high quality standards require analytical tools capable of supporting the design and evaluation of new process configurations. In this context, this thesis aims to map the constraints and resources involved in the production of a new eyewear collection, with the aim of assessing the operational sustainability of the production system and identifying potentially critical areas. From a theoretical point of view, the work falls within the scope of operations engineering and is based on the integration of three main perspectives. First, the Theory of Constraints provides the interpretive framework for identifying constraints and bottlenecks, understood as resources whose capacity limits the overall performance of the system.