Configuration estimation method for preliminary cost of ships based on engineering bills of materials

Son, Myeong-Jo; Lee, Sang Chul; Kwon, Ki-chang; Kim, Tae‐Wan; Sharma, R.

doi:10.1007/s00773-011-0139-9

Cited by 7 publications

(2 citation statements)

References 7 publications

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“…In shipyards with data from many previous ships, similar ships are defined as previous ships that are similar to the new ship ordered in the sales process and are determined by using technical parameters [4]. The similar ships may share as much as 60% − 80% of the data for the new ship; the similarity in a ship series may be up to 80% − 100%.…”

Section: Present State Of Information Reuse Of Similar Shipsmentioning

confidence: 99%

Development of a simple model for batch and boundary information updation for a similar ship’s block model

Lee

Son

et al. 2012

Sci. China Inf. Sci.

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In early 2000, large domestic shipyards introduced shipbuilding 3D computer-aided design (CAD) to the hull production design process to define manufacturing and assembly information. The production design process accounts for most of the man-hours (M/H) of the entire design process and is closely connected to yard production because designs must take into account the production schedule of the shipyard, the current state of the dock needed to mount the ship's block, and supply information. Therefore, many shipyards are investigating the complete automation of the production design process to reduce the M/H for designers. However, these problems are still currently unresolved, and a clear direction is needed for research on the automatic design base of manufacturing rules, batches reflecting changed building specifications, batch updates of boundary information for hull members, and management of the hull model change history to automate the production design process. In this study, a process was developed to aid production design engineers in designing a new ship's hull block model from that of a similar ship previously built, based on AVEVA Marine. An automation system that uses the similar ship's hull block model is proposed to reduce M/H and human errors by the production design engineer. First, scheme files holding important information were constructed in a database to automatically update hull block model modifications. Second, for batch updates, the database's table, including building specifications and the referential integrity of a relational database were compared. In particular, this study focused on reflecting the frequent modification of building specifications and regeneration of boundary information of the adjacent panel due to changes in a specific panel. Third, the rollback function is proposed in which the database (DB) is used to return to the previously designed panels.

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Section: Present State Of Information Reuse Of Similar Shipsmentioning

confidence: 99%

Development of a simple model for batch and boundary information updation for a similar ship’s block model

Lee

Son

et al. 2012

Sci. China Inf. Sci.

Self Cite

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“…In a previous study, a segment framework of the ship structure was applied to estimate the preliminary cost [13]. The qualitative complexity criteria have also been considered for estimating six segments of a ship in the concept design stage [14].…”

Section: Introductionmentioning

confidence: 99%

Preliminary parametric estimation of steel weight for new ships

Lin

Shaw

2015

J Mar Sci Technol

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This paper presents an agile method for accurately estimating the steel weight of a new ship in the preliminary design stage. A container ship database within a three-dimensional computer-aided design system was used to facilitate the division of a ship into several estimated structural sections, including the forward, cargo, engine room, aft, etc. This procedure is an improvement over the traditional parametric estimation process, which only estimates a rough weight for an entire ship based on specific empirical formulas and then assigns a weight to each part of the ship manually. To estimate the steel weight of a new ship, the parameters of the individual sections are referenced from a similar vessel automatically selected using the principal dimension. Next, principal component analysis is applied to define the principal parameters, i.e., the principal dimension, the feature of each section and the fitting coefficient of the principal parameters. The general equations with the highest correlative predictor variables for the individual sections are then obtained by regression. Comparing the estimation variability, the section estimation provides a more accurate steel weight and constitutes a new means of efficiently obtaining the weight distribution to support the various aspects of preliminary design, i.e., the determination of the center of gravity, the design of the ship lines and ship performance evaluation.

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A method for comparing panel complexity to traditional material and production cost estimating techniques

Rigterink

Collette

2013

Ocean Engineering

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Configuration estimation method for preliminary cost of ships based on engineering bills of materials

Cited by 7 publications

References 7 publications

Development of a simple model for batch and boundary information updation for a similar ship’s block model

Development of a simple model for batch and boundary information updation for a similar ship’s block model

Preliminary parametric estimation of steel weight for new ships

A method for comparing panel complexity to traditional material and production cost estimating techniques

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