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This study addresses the practical application of a Hybrid System of Production Control in the manufacturing process of machine parts in an industry of agricultural machine part industry. In the proposal, the production planning section send and work order to the manufacturing section where the first step in the production chain starts. Once the hybrid system for the production control was implemented, its effects were registered and analyzed during the next seven consecutive months. The results were compared with the seven months just before the date of implementation. It was noticed after the study that there was an increase in the number of parts produced and sold. It was also observed that there was better supply of the weld lines and higher utilization of those machines that face restrictions regarding to the lack of raw material, quality problems, and increments of requests and a reduction of bottlenecks in the production lines. As a main conclusion it can be highlighted the enhancement of the line efficiency in terms of the synchronization between demand and production levels.

II Conferencia de Ingeniería de Organización Vigo, 5-6 Septiembre 2002 El sistema de control de la producción CONWIP (CONstant Work In Process) fue introducido por Spearman et al. [1]. Éste puede encuadrarse dentro de los sistemas denominados tipo pull, aunque debido a su estructura contiene características de sistemas push. Su filosofía es reducir los costes asociados a elevados niveles de inventario, característico de los sistemas push en entornos dinámicos. Desde su concepción hasta nuestros días han surgido distintas aportaciones y modificaciones del sistema originario. En este trabajo se realiza una revisión del estado de la cuestión sobre las contribuciones de los distintos autores, con el objeto de explorar futuras líneas de investigación. Ministerio de Ciencia y Tecnología DPI2001-3110