Abstracts – Browse Results
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Alarcón, L F and Bastias, A (2000) A computer environment to support the strategic decision-making process in construction firms. Engineering, Construction and Architectural Management, 7(01), 63–75.
Edwards, D J and Holt, G D (2000) ESTIVATE: a model for calculating excavator productivity and output costs. Engineering, Construction and Architectural Management, 7(01), 52–62.
- Type: Journal Article
- Keywords: construction plant; cost estimation; hydraulic excavators; machine cycle time; productivity
- ISBN/ISSN: 0969-9988
- URL: http://www.ingentaconnect.com/content/bsc/ecam/2000/00000007/00000001/art00132
- Abstract:
Hydraulic excavator cycle time and associated unit costs of excavation for given input estimating data, for machines operating in the UK construction industry, are predicted. Using multiple regression analysis, three variables are identified as accurate predictors of cycle time: machine weight, digging depth and machine swing angle. With a coefficient of determination (R2) of 0.88, a mean percentage error (MPE) of -5.49, and a mean absolute error (MAPE) of 3.67, the cycle time model is robust; this is further validated using chi-square analysis and Pearson's correlation coefficient (on predicted and actual values of machine cycle time). An illustrative example of the model's application to determine machine productivity is given. The paper concludes with a spreadsheet model for calculating excavation costs (m3 and cost per h) which is able to deal with any combination of the three independent cycle time predictor variables and other estimator's input data.
Huang, R-Y and Halpin, D W (2000) Graphically based LP modelling for linear scheduling analysis: the POLO system. Engineering, Construction and Architectural Management, 7(01), 41–51.
Kamara, J M, Anumba, C J and Evbuomwan, N F O (2000) Establishing and processing client requirements-a key aspect of concurrent engineering in construction. Engineering, Construction and Architectural Management, 7(01), 15–28.
Kumar, V S S, Hanna, A S and Adams, T (2000) Assessment of working capital requirements by fuzzy set theory. Engineering, Construction and Architectural Management, 7(01), 93–103.
Li, H, Cheng, E W L and Love, P E D (2000) Partnering research in construction. Engineering, Construction and Architectural Management, 7(01), 76–92.
Loh, W H and Ofori, G (2000) Effect of registration on performance of construction subcontractors in Singapore. Engineering, Construction and Architectural Management, 7(01), 29–40.
Naoum, S and Haidar, A (2000) A hybrid knowledge base system and genetic algorithms for equipment selection. Engineering, Construction and Architectural Management, 7(01), 3–14.