Introduction to restructuring of Mid Tier Navy Shipyard by Developing Rough Layout Concept

Abstract

The irregular demand in ship types, besides, limited timeframe to deliver either navy or commercial ships play a great role in shipbuilding industry. Therefore, shipyards are trying to reduce delivery times also reducing production cost. The main goal of this master thesis is to develop proposals for restructuring workflow of mid-tier shipyard using methodology that [WAN 10-2] proposed, rough layout concept and discrete-event-simulation (DES). In order to accomplish with this goal, brief explanation about ship production process is given, description of simulation used in this field. Besides, brief analysis of capacities in diverse software and capacities of the shipyard used as case of studies. As introduction of this type of study, using as case of study a navy ship called Offshore Patrol Vessel – OPV80. The first existing condition was modeled and validated considering averages values for workstations. In order to get better understanding of production rate, assessing effect of each workstation on overall production process is done. Following, using this existing and validated model was possible creation of various scenarios. Two scenarios were performed in endeavor to improve productions time. One of this scenarios deal with the inclusion of automation in production line and the other deal with layout of the workflow proposed to reduce the time used to move the material along the production line. In this master thesis simulation analysis had shown how to evaluate either risk or impact of future investments or changes in production line, varying parameters and measure outputs. Furthermore, considering the influence of each parameter in the production line and bottleneck assessment. Key words: Ship Production, Simulation, Mid-tier Shipyard, and Production Line.