Hybrid Push-Pull Systems: Classification, Optimal Methods and Uncertainty

In actual competitive world, where consumer needs are changing and specific, manufacturing companies should work on your Planning and Production Con-troll Systems to have efficient Production Systems. In this way, they have worked with the Push and Pull Systems in their pure form and with some improvements, according to the conditions of each Production System. At the end of the decade of the 80's and early 90's research began combining the ad-vantages of Pull and Push Systems in Hybrid Push-Pull Systems in different ways, to improve the performance indicators and to meet the demands; there are a considerable number of researches in this area. In this paper, we made a review of Hybrid Push-Pull Systems in two ways: on the one hand the classification of hybrid systems and in the other hand, an analysis of the costs used in the objective functions of optimal hybrid systems. We found hybrid systems classifications in vertically and horizontally integrated hybrid systems; likewise, also found optimal hybrid systems applying exact and metaheuristics optimization techniques, with the optimization of the costs.