Design Cost Modelling - The Way Forward

Peter M Lawther
Peter J Edwards


Design cost modelling is a fundamental cost management support tool used by construction economists/quantity surveyers. The accuracy of design cost modelling is vital to the success of building developments and the viability of clients, consultants and contractors. This paper reports upon design cost modelling research currentlu being undertaken at the department of Building and Construction Economics at RMIT. The paper positions the research by presenting an overview of design cost modelling techniques, their accuracy, deficiencies and usage. Conclusions are drawn that traditional methods of building procurement stifle attempts to advance the accuracy of current design cost modelling techniques used by consultant quantity surveyors. However, recent shifts in procurement trends provide fresh opportunities to re-invigorate design cost modelling research.

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Ashworth, A. and Skitmore, R.M. (1983) Accuracy in estimating. Occasional Paper No. 27. Chartered Institute of Building. United Kingdom.

Ashworth, A. (1995) Cost Studies of Buildings. 2nd Edition. Longman Group, London.

Ashworth, A. (1999) Cost Modelling. In Building in Value, Best, R. and De Valence, G. (eds). Arnold, London.

Beeston, D. (1973) Report. Directorate of Quantity Surveying Development, Property Services Agency. Department of the Environment, London.

Beeston, D. (1974) One statistician's view of estimating. Cost Study F3, BCIS1974/5-123-9 to 16, Building Cost Information Service. Royal Institution of Chartered Surveyors, London.

Beeston, D. (1982) Statistical Methods for Building Price Data. E & FN Spon, London.

Beeston, D. (1987) A future for cost modelling. In Building Cost Modelling and Computers, Brandon, P. (ed). E & FN Spon, London.

Bennett, J. and Ormerod, R.N. (1984) Simulation applied to construction projects. Construction Management and Economics. Vol.2, No.3, pp:225-263. E & FN Spon, London.

Bowen, P.A. (1993) A communication-based approach to price modeling and price forecasting in the design phase of the traditional building procurement process in South Africa. Unpublished PhD thesis, University of Port Elizabeth, South Africa.

Bowen, P.A. and Edwards, P.J. (1998) Building Cost Planning and Cost Information Management in South Africa, Journal of Construction Procurement, Vol.4, No.1, pp16-26. The International Procurement Research Group. Glamorgan University, United Kingdom.

Bowen, P.A, Wolvaardt, and J.S, Taylor, R.G. (1987) Cost modelling: a process modelling approach. In Building Cost Modelling and Computers, Brandon, P. (ed). E & FN Spon, London.

Brandon, P. (1982) Building cost research: need for a paradigm shift? In Building Cost Techniques - New Directions, Brandon, P. (ed). E & FN Spon. London null

13 Elhag, T.M.S. and Boussabaine, A.H. (1998) Factors Affecting Cost and Duration of Construction Projects. EPSRC Research Report. The University of Liverpool, United Kingdom."

Flanagan, R. and Norman, G. (1978) Relationship between construction price and height. In Cost Modelling, Skitmore, M. and Marston, V. (eds). E & FN Spon, London.

Flanagan, R. and Norman, G. (1983) The accuracy and monitoring of quantity surveyors price forecasting for building work. Construction Management and Economics. Vol.1, No.2, pp:157-180. E & FN Spon, London

16 Fortune, C. and Lees, M. (1996) The relative performance of new and traditional cost models in strategic advice for clients. RICS Research Paper Series, Vol.2, No.2, March. Royal Institution of Chartered Surveyors, London."

Fortune, C. and Hinks, J. (1998) Strategic building project price forecasting models in use - paradigm shift postponed. Journal of Financial Management of Property and Construction. Vol.3, No.1, pp:5-25. University of Ulster, United Kingdom.

Franks, J. (1998) Building Procurement Systems. Addison Wesley Longman. UK. James, W. (1954) A new approach to single price rate approximate estimating. In Cost Modelling, Skitmore, M. and Marston, V. (eds). E & FN Spon, London.

Kim, K., Kim, J.J., and Ahn, B-J. (1999) Collaborative construction planning data model for cost estimation, scheduling and cost control systems. International Journal of Computer Integrated Design and Construction. Vol.1, No.1, pp:49-60. Department of Civil and Building Engineering, Loughborough University, United Kingdom.

Love, P.E.D., Gunasekaran, A., and Li, H. (1998) Concurrent engineering: a strategy for procuring construction projects. International Journal of Project Management. Vol.16, No.6, pp:375-384. Elsevier Science, Oxford.

Mathur, K.S. (1987) Simulation Applied to Cost Prediction. Australian Institute of Building Papers, No.2, pp:13-29.

McCaffer, R. and Baldwin, A.N. (1986) Estimating and Tendering for Civil Engineering Works. Collins, London.

Morton, R. and Jagger, D. (1995) Design and the Economics of Building. E & FN Spon, London.

Morrison, N. (1984) The accuracy of quantity surveyors' cost estimating. Construction Management and Economics. Vol.2, No.1, pp:57-75. E & FN Spon, London.

Newton, S. (1989) Cost Management and the Project Manager. School of Building, University of Technology, Sydney.

Ogunlana, S.A. (1989) Accuracy in Design Cost Estimating. Unpublished Phd Thesis. Loughborough University of Technology, United Kingdom.

Raftery, J. (1984) Models in building economics: a conceptual framework for the assessment of performance. In Proceedings 3rd International Symposium on Building Economics. CIB W-55, Ottawa.

Skitmore, R.M. and Marston, V.K. (1999) Cost Modelling. E & FN Spon. London.

Skitmore, R.M. and Patchell, B.R.T. (1990) Developments in Price Forecasting and Bidding. In Quantity Surveying Techniques: New Directions, Brandon, P. (ed). Blackwell Scientific Publications, Oxford.

Skoyles, E.R. (1968) Introducing Bills of Quantities (Operational Format). The Quantity Surveyor. May/June, pp:139-146. Institute of Quantity Surveyors, London.

Smith, J. (1998) Building Cost Planning for the Design Team. Deakin University Press, Geelong.

Turner, A. (1997) Building Procurement. Macmillan. London.