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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 30
Edited by: B.H.V. Topping
Paper II.2

Case-Based Design Approach for Integration of Design and Estimating

S. Perera*, I. Watson# and M. Alshawi#

*Department of Building Economics, University of Moratuwa, Moratuwa, Sri Lanka
#Department of Surveying, University of Salford, Salford, UK

Full Bibliographic Reference for this paper
S. Perera, I. Watson, M. Alshawi, "Case-Based Design Approach for Integration of Design and Estimating", in B.H.V. Topping, (Editor), "Developments in Computer Aided Design and Modelling for Civil Engineering", Civil-Comp Press, Edinburgh, UK, pp 29-41, 1995. doi:10.4203/ccp.30.2.2
This paper identifies the need for computer assisted integration within the construction industry and briefly introduces the paradigm of Case-Based Reasoning as platform for the integration of design and estimating. It analyses the concepts of Case-Based Design and Case-Based Estimating and its pertinence in construction. It then proposes a framework for the integration of design, estimating and construction i.e. the conceptual model of NIRMANI (meaning designer in "Sinhalese"). The NIRMANI system uses a multimedia case-base of previous designs and their respective cost analyses for the creation of new schematic designs and estimates. I.e. it uses previous designs and their cost structures along with the initial brief to produce the initial schematic design and the corresponding cost plan. The multimedia features of the system is used to enhance presentation characteristics and the understanding of the design by the design team and the client. The paper explains in detail the hierarchical case memory organisation structure and the adaptation strategy used in the system. It concludes by highlighting the benefits of the system proposed and developing pointers for future directions.

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