the stock of Ships after time 10). Figure 5 - Correlation between Ships and Freight price by System Dynamics analysis.Figure 6 presents the stock-flow diagram expressing the industries collaboration formation. The amount of industries operating in the market is given by the stock Industries. The stock is modified by its inflow and outflow: new industries attractiveness and collaboration abandonment, respectively. As the number of Industries increases, the power bargain on freight negotiations is also increased (expressed by the conversor power bargain effect on ships recruitment) and vice-versa. This conversor is given by a LOOK UP function. As the power bargain effect on ships recruitment increases, the cost of collaboration reduces since is given a discount on the freight price.The converter profit ratio measures the ration between the cost of collaboration and the industry individual cost without collaboration. This result will influence the attractiveness effect (LOOK UP function), which directly influences the inflow new industries. As the profit ratio increases, the attractiveness also increases and new industries come into the collaboration. On the other hand, as the amount of profit ratio increases there is a decreasing effect in the profit effect on abandonment leading to an increase in the collaboration abandonment. It means the Industries will receive less profit individually if there are a large number of them in the market, discouraging them to continue in the collaboration. Figure 6 - Stock-flow diagram for the industries collaboration formation5.1 CommentsAs mentioned previously, the aim of the diagrams construction was to clarify the understanding about the negotiations of the maritime freight prices. Thus, to initiate the construction of the stock-flow diagram for analyzing the behavior of the collaboration in the manufactured goods exportation process, it was presented a drawing for the offer-demand system, considering as main agents the amount of Ships disposable in the market and the practiced Freight price. Such consideration was made in order to establish a growing drawing process, avoiding mistakes during the modeling process. It is quite common researchers start elaborating a complete stock-flow diagram but in the sequence, they discover failures in the model. In these cases it is easier to start a new model from the beginning then trying to fix it.With the modeled diagram it is possible to analyze the process involving the Ships offer-demand and its correlation with the Freight price variations. As found in the literature the offer reduces as the profits are reduced, reinforcing the proposed model. The following step in the growing drawing process was to draw the stock-flow diagram for the industries collaboration formation. With such scheme it was possible to analyze the main impressive factors in defining the behavior of the collaboration adopted by the manufactured goods industries in the maritime transportation process. Although the developed diagrams represent the general behavior of the maritime transportation market, the suggested results do not represent the real world negotiations due the lack of real data to take into consideration in such analysis. For this reason it is recommended to test the model considering real data practiced by manufactured goods industries and maritime carriers, including demand