Whatever the management system, production hazards, delays, urgent orders cause many disfunctioning. This leads to differences between the real inventory level and the level required by the management system. Is it possible to remedy this? In certain cases, IBM Montpellier answers this question by developing a bottom—up replanning approach called implosion. Its use enables perception of different possible scenarios to manufacture end—products per period, as well as the probable induced consequences. In this article, we first describe this solution in the manufacturing context, its principles and limits, as well as the industrial probe that permitted us to establish an enterprise typology based on the possible use of implosion. Then, the theoretical concept is presented and the NP Hard problems contribution to this approach. Finally, we present the different techniques envisaged to solve it.