Abstract
Compared with the ordinary merchant ship building, the concentralized distribution in cruise building is more complex. Plan change is a common phenomenon in cruise building, and it is easy to lead to mismatch between production and logistics, resulting in risks such as production schedule delay and inventory backlog. In order to reduce the adverse effects of plan change on the shipyard, it is necessary to conduct an in-depth study on the risks of a centralized distribution logistics plan. Based on the analysis of the composition of the centralized distribution logistics planning system, risk factors in different plan links are identified in this paper. A system dynamic model is constructed to simulate the propagation of five basic types of planning risk, including procurement plan, warehousing plan, pallet concentralization plan, distribution plan and production plan. In the case study of HVAC (heating, ventilation and air conditioning) materials, the values of risk factors are estimated though consulting experts with questionnaire. The weight of each risk factor in each subsystem is calculated by a method combined with analytic hierarchy process and coefficient of variation method. Through the simulation experiments carried out in Vensim, it is found that both inventory backlog risk and cruise construction schedule delay risk increase with the increasement of estimated values of risk factors, which is an effective proof of the rationality of the model, and that the most sensitive risk factor for both the two kinds of risk is production planning risk.
Highlights
Cruise ship construction is a giant system of engineering, with a complex process, long construction cycle and a huge quantity of materials
The trend chart of cruise construction schedule delay risk and inventory backlog risk caused by the plan change risk of concentralized distribution logistics in cruise construction and the risk trend of each level variable within a given time range are obtained
The most sensitive factor for both inventory backlog and cruise construction schedule delay are the same, production plan change, because production plan is the source of concentralized distribution logistics plan
Summary
Cruise ship construction is a giant system of engineering, with a complex process, long construction cycle and a huge quantity of materials. In order to deliver the cruise on schedule, it is necessary to pay attention to the cruise construction production plan and concentralized distribution logistics planning management to ensure material distribution. In order to facilitate the readers who do not know much about the shipbuilding industry to understand this paper, this section first describes the concentralized distribution logistics process in cruise construction, and introduces the concentralized distribution logistics planning system on this basis. Under the guidance of “lean shipbuilding”, the modern shipbuilding mode applies group technology, coordinates all production and construction activities, and produces in the way of subsection assembly. It gradually forms the orderly and synchronous operation of shell fitting, outfitting and painting, and realizes the shipbuilding technology of integration of design, production and management
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