This is a text book as well as a reference book for decision making in construction. The book is written to serve undergraduates of construction-related programmes and postgraduate students undertaking construction management bridging courses. It contains mainly quantitative techniques used to assist decision making, including analytic hierarchy process (AHP), decision theories, conditional probabilities and the value of information, inventory modeling, dynamic programming, Monte-Carlo simulation, CYCLONE simulation modeling, information systems and process of decision making in construction. Plenty of real life examples are used to illustrate the theories, arguments and calculations. It is written in simple and easy to understand language. Readers will benefit from the book even by self studying because all the topics are described and developed in a logical and organized manner, from basic to complex. Moreover, the most up-to-date information on the development of AHP, simulation modelling, information systems and process of decision making are covered.