The University of Southampton
University of Southampton Institutional Repository

An activity-based-parametric hybrid cost model to estimate the unit cost of a novel gas turbine component

Record type: Article

The first tool presented in this paper is a generic factory cost model that can estimate various costs at multiple levels of any manufacturing plant. The model is activity based which means that the cost of each manufacturing operation is calculated and then summed up so that the true £-per-hour factory cost rate as well as the exact unit cost (i.e. manufacturing cost) of an unlimited number of different components can be estimated.

The second tool is a scalable cost model that predicts the unit cost of future integrally bladed disc (blisk) designs that are found in gas turbine compressors. The tool multiplies the machine cost rates, calculated by the factory cost model, by the operation times derived from blisk scaling rules. As the operation times often depend on the number of blades, the disc diameter and other design variables, many scaling rules are based on the correlation between operation times and certain design parameters. Conversely, the remaining process times are constant because they are independent of the blisk geometry. As future process times can only be estimated and the correlation between operation times and design parameters is never perfect, all operation times have uncertainty distributions. These are cascaded through the model to generate a probability distribution of the unit cost.

Through the interactive exchange of detailed cost information at the manufacturing operation level as well as extrapolated operation times, the two cost models facilitate design and manufacturing engineering to concurrently optimise blisk designs and manufacturing processes in terms of cost.

PDF paper.pdf - Accepted Manuscript
Download (1MB)

Citation

Langmaak, Stephan, Wiseall, Stephen, Bru, Christophe, Adkins, Russell, Scanlan, James and Sóbester, András (2013) An activity-based-parametric hybrid cost model to estimate the unit cost of a novel gas turbine component International Journal of Production Economics, 142, (1), pp. 74-88. (doi:10.1016/j.ijpe.2012.09.020).

More information

Published date: March 2013
Keywords: activity-based costing (abc), cost estimating relationship (cer), factory cost modeling, integrally bladed disk (blisk), parametric cost modeling, uncertainty
Organisations: Computational Engineering and Design, Computational Engineering & Design Group

Identifiers

Local EPrints ID: 193725
URI: http://eprints.soton.ac.uk/id/eprint/193725
ISSN: 0925-5273
PURE UUID: 609f9e2a-6c12-4597-9608-bb15e5b148b6
ORCID for András Sóbester: ORCID iD orcid.org/0000-0002-8997-4375

Catalogue record

Date deposited: 19 Dec 2011 14:40
Last modified: 18 Jul 2017 11:28

Export record

Altmetrics


Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×