A Production Planning and Control Methodology Proposal for Shipyards

There is a major manpower requirement for process production in shipyard industry under hard working conditions with hazardous material. Shipbuilding period comprises cutting and marking of the steel plates, steel fabrication, assembly of the sections, erection on slipway, launching of the vessel, sea trials and the delivery of the vessel to the Owner. Block fabrication is the main production process in shipyards. It includes many kinds of inputs and interconnected processes and each process has an effect on the next stages of a ship's life cycle. Thus, a good planning ought to be developed to make an efficient producing process. Besides, due to the growing environmental awareness, new and innovative methods must be implemented in ship manufacturing. In this study, work-flow and data have been obtained from production stations of a shipyard, which has duplicate production concept, and critical chain, project and feeding buffers have been calculated. The obtained data has been compared with the results of calculation and result has revealed that the new findings have contributed to gaining a more fruitful production process.

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Approximate Estimation of Man-Day in Ship Block Production: A Two-Stage Stochastic Program

Genç,

Kafali,

Çelebi

2024

Polish Maritime Research

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It is critical to estimate the workforce requirements for the production of blocks in shipbuilding. In this study, the number of workforce (man-day) required for the production of a passenger ship’s double bottom block was estimated. Initially, the production of the block was observed, and the average working performance of the mounting, welding, and grinding workers was recorded. Block drawings were examined and the work required was calculated. The amount of work increased, depending on any revisions required due to incorrect or incomplete designs. The average working performance of an employee is uncertain due to environmental factors, including the weather and working conditions, as well as health (both physical and mental). A two-stage stochastic programming model with recourse was established to estimate man-day required and a Sample Average Approximation (SAA) technique was used to obtain a near-optimum solution. The results of the study were compared with shipyard records and an agreement of approximately 90% was achieved.

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A Production Planning and Control Methodology Proposal for Shipyards

Cited by 4 publications

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A study on sub-work based work package determination methodology for shipyards

A study on sub-work based work package determination methodology for shipyards

Kisitlar Teoremi̇ Yaklaşimiyla Yeni̇li̇kçi̇ Tersane Proje Yöneti̇mi̇ Geli̇şti̇ri̇lmesi̇

Approximate Estimation of Man-Day in Ship Block Production: A Two-Stage Stochastic Program

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