Engineering Experts

Siu Lam Tang

Department of Civil and Environmental Engineering
University of Macau


Professor S. L. Tang is a Chartered Civil Engineer and obtained his B.Sc. in Civil Engineering from the University of Hong Kong in 1972, M.Sc. in Construction Engineering from the National University of Singapore in 1977, and Ph.D. from Civil Engineering Department of Loughborough University of the U.K. in 1989. He is a Fellow of the Hong Kong Institution of Engineers (FHKIE) and also a Fellow of the UK's Institution of Civil Engineers (FICE). He had working experience in civil engineering practice in contracting/consulting firms and government departments of Singapore and Hong Kong. He taught in several universities, including those in Hong Kong (mainly the Hong Kong Polytechnic University and City University of Hong Kong), Macau, China, Australia and the USA. Prof. Tang is an engineering economist, and is the first scholar in the world who proposed that NPV (net present value) is an economic indicator and IRR (internal rate of return) a financial indicator in his book Economic Feasibility of Projects (1st edition) published by McGraw-Hill in 1991. He also substantiated the discovery of this fundamental difference between NPV and IRR with a mathematical proof, published in the international journal “Engineering Economist” in 2003.

Research Interest

Construction Management & Economics, Water & Environmental Management


  • Kam, C.W. and Tang, S.L. (1995) ISO-9000: A Comparison of The 1987 and 1994 Editions. Asia Engineer, Journal of HKIE. March 1995, p.10-14.

  • Tang, S.L. and Ellis, K.V. (1994) Wastewater Treatment Optimization Model for Developing World, Part II: Model Testing. ASCE Journal of Environmental Engineering. 120(3): 610-624.

  • Ellis, K.V. and Tang, S.L. (1991) Wastewater Treatment Optimization Model for Developing World, Part I: Model Development. ASCE Journal of Environmental Engineering. 117(4): 501-518.

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