The coordination of decentralized multi - site multi - product manufacturing SCs is achieved through Scenario - Based Negotiation s (SBN s ) based on expected win - win principles in an uncertain competitive environment . Based on the non - symmetric roles of t he different actors , the client (SC leader ) is supposed to propose coordination contract s according to its best expected conditions , taking into account the uncertain reaction of the provider ( follower ). This uncertain reaction is modeled as a probability of acceptance , computed according to the overall scenario conditions, which include the presence of third parties . Different negotiation scenarios are analyzed considering i) Standalone, ii) Cooperative, and iii) Non - Cooperative cases . The resulting MINLP tactical models are illustrated using a case study with different providers ( follower SCs ) around a client ( SC leader ) interacting in a global decentralized scenario. The Non - Cooperative Negotiation Scenario ( nCNS ) proves to identify the situation with , hi gher independent profit expectations , while cooperation would lead to higher overall profit . Moreover, the proposed approach show s the importance of considering the uncertainty associated with the response of the follower s to the leader's decision - making, resulting from a wider knowledge of its options