Modelling a port logistics process using the structured analysis and design technique

摘要

In this paper, we define the boundaries of a port cluster system and make an attempt to analyse how port cluster companies engage in the port logistics process. In order to visually present the intra-port clusters, we have used the 'Structured Analysis and Design Technique' (SADT). SADT was chosen, as it provides a robust structured method to model hierarchical systems and for this research it provides an opportunity to define and analyse the cluster in terms of the port logistics process, port activities and the actors. Applying SADT to the case of Busan Port in Korea, the constituent activities of a port cluster are defined in terms of inputs, control, mechanism and outputs. The port cluster system is broken down into six sub-level SADT diagrams: voyage supporting system, port entry system, stevedoring system, transit system, storage system and inland transport connecting system. These six phases plus the port information system were considered as the seven phases of a port logistics process. This categorization was established by carrying out a number of interviews in Busan Port and by analysing eight cases of ships calling in the port. Each sub-level diagram is connected to others according to the cargo flow in the port logistics process. This research demonstrates that the visualization facilitating SADT not only helps in understanding the interrelationships between associated companies in the port cluster, but also, to some extent, explains how port users and port cluster companies engage in the port logistics process.