Aiming at the insufficiency that the traditional sales-rebate contract cannot coordinate the supply chain, this paper studies how sales-rebate contract influences the coordination of supply chain induced by fairness preferences. Assuming the retailer is fairness preferred in the market with random demand, the paper analyzes two situations, namely, retailer order less than the sales-rebate threshold and not less than the sales-rebate threshold by the fairness preferred model. We find that taking into consideration fairness preferences in sales-rebate contract broadens the voluntary cooperation prospects between suppliers and retailers, can increase the profit of the overall supply chain, and has the balanced result of fully cooperation, which better coordinates the supply chain. Finally, a numerical example is given to demonstrate the model.
Since the plant-grid's separation, the on-grid prices cannot be adjusted timely with the coal price, the recurring electrical scarcity has produced huge influence on economic development. Based on the idea of supply chain capacity management and the original results about the rate fundamental in-tree modeling, the research found the three-step modeling method of earlier rate fundamental in-tree to solve the difficulty about building the cause & effect chain. Focused on the rate variable, the research constructed two-part associated diagram and reverse-extend diagram to build an electrical supply chain capacity management dynamics model and an equal flowgraph model. The research studies the function of the earlier rate fundamental in-tree model, then case studies the causation chain while the coal prices have risen sharply and the on-grid prices cannot be adjusted timely. This paper has set the stage for the feedback loop analysis method to study the reason of the recurring electrical scarcity, and the three-step counterplan method to produce the tactics for lessening the danger of electrical scarcity.
To establish the universal model of repairable spare parts inventory distribution, considering relative important repair parameters such as “repair in place rate”, “duty cycle” and the “retest ok rate”, the initial inventory distribution model for multi-indenture spare parts under the multi-echelon maintenance supply system is established based on the METRIC theory. The equipment availability, spare parts fill rate and support delay is used as the optimization target while the cost is taken as the constraint to optimize the inventory distribution project. The optimization result is got through a given example, and the support factors are analyzed. The result is tested by VMETRIC simulation software, which shows that the two experiment results are nearly identical, so the model's correctness and the algorithm's rationality are proved.