TY - JOUR

T1 - A building cost estimation model based on cost significant work packages

AU - Tas, Elcin

AU - Yaman, Hakan

PY - 2005

Y1 - 2005

N2 - Purpose - The objectives of this paper are to discuss the constraints stemming from the unstructured nature of the cost estimation practice in Turkey and introduce a generic computer aided building cost estimation model based on a cost significant technique for Turkish construction sector public projects in its detailed design phase. Design/methodology/approach - The research design was based on the simplified version of the bill of quantities method and a cost significant estimating model works on a cost database was suggested to overcome the problems. Underlying principles and basic steps of cost estimation based on cost significant work packages was explained by means of manual calculations. Findings - In order to automate the manual building cost estimation process, the software based on cost significant work packages was developed. Research limitations/implications - The software is currently in the testing phase and is being used for educational purposes. Making use of both public sector and current market prices in the cost estimation process, increasing number of projects stored in the database for more accurate results, estimating costs of different types of projects and calculating the cost significant value factor more precisely by using statistical techniques, those being employed by global cost models are suggested for future research. Practical implications - As the number of the similar projects in database is increased, the accuracy of the cost estimation is also increased. Originality/value - Estimators and graduate students can use the software to estimate building cost of public housing projects in its detailed design phase.

AB - Purpose - The objectives of this paper are to discuss the constraints stemming from the unstructured nature of the cost estimation practice in Turkey and introduce a generic computer aided building cost estimation model based on a cost significant technique for Turkish construction sector public projects in its detailed design phase. Design/methodology/approach - The research design was based on the simplified version of the bill of quantities method and a cost significant estimating model works on a cost database was suggested to overcome the problems. Underlying principles and basic steps of cost estimation based on cost significant work packages was explained by means of manual calculations. Findings - In order to automate the manual building cost estimation process, the software based on cost significant work packages was developed. Research limitations/implications - The software is currently in the testing phase and is being used for educational purposes. Making use of both public sector and current market prices in the cost estimation process, increasing number of projects stored in the database for more accurate results, estimating costs of different types of projects and calculating the cost significant value factor more precisely by using statistical techniques, those being employed by global cost models are suggested for future research. Practical implications - As the number of the similar projects in database is increased, the accuracy of the cost estimation is also increased. Originality/value - Estimators and graduate students can use the software to estimate building cost of public housing projects in its detailed design phase.

KW - Computer applications

KW - Construction industry

KW - Cost allocation

KW - Cost estimates

KW - Turkey

UR - http://www.scopus.com/inward/record.url?scp=21044459165&partnerID=8YFLogxK

U2 - 10.1108/09699980510600116

DO - 10.1108/09699980510600116

M3 - Article

AN - SCOPUS:21044459165

SN - 0969-9988

VL - 12

SP - 251

EP - 263

JO - Engineering, Construction and Architectural Management

JF - Engineering, Construction and Architectural Management

IS - 3

ER -