Calculation of "normal"construction time for building construction projects whilst considering uncertainties

Christian Hofstadler*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Construction time has a major influence both on the cost-efficient execution of construction works and on the overall project outcome achieved by the client. Clients would do themselves a disservice if they specified short or extremely short construction periods for their projects. The same applies to time made available for project preparation, particularly for the design and tender stages. Any project that is poorly planned, tendered, and executed under time pressure will adversely affect actual construction work but also the building's use and possible reuse. Cost, time and quality targets are at risk due to the resulting disruptions to the construction process. Productivity is adversely affected not only by unduly short but also exceedingly long construction times. Short or very short construction times have a major influence on the efficient and effective utilization of production factors, including elementary (workforce, materials, equipment and machinery) and discretionary factors (project manager, site manager, technicians, etc.). This paper outlines the basic correlation between construction time, labor consumption rates and productivity as well as construction cost. Furthermore, it sets out to determine the influence of construction time on costing and, consequently, on the construction process. A practical example demonstrates how normal construction time can be calculated for reinforced concrete works based on uncertain input parameters. In addition, the benefits of specifying normal construction time for clients and contractors are outlined.

Original languageEnglish
Title of host publicationISEC 2017 - 9th International Structural Engineering and Construction Conference
Subtitle of host publicationResilient Structures and Sustainable Construction
EditorsJose M. Adam, Eugenio Pellicer, Siamak Yazdani, Amarjit Singh, Victor Yepes
PublisherISEC Press
ISBN (Electronic)9780996043748
Publication statusPublished - 1 Jan 2017
Event9th International Structural Engineering and Construction Conference: Resilient Structures and Sustainable Construction, ISEC 2017 - Valencia, Spain
Duration: 24 Jul 201729 Jul 2017

Publication series

NameISEC 2017 - 9th International Structural Engineering and Construction Conference: Resilient Structures and Sustainable Construction

Conference

Conference9th International Structural Engineering and Construction Conference: Resilient Structures and Sustainable Construction, ISEC 2017
CountrySpain
CityValencia
Period24/07/1729/07/17

Keywords

  • Chance/risk ratio
  • Construction cost
  • Construction time
  • Histogram
  • Monte Carlo simulation

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction

Fingerprint Dive into the research topics of 'Calculation of "normal"construction time for building construction projects whilst considering uncertainties'. Together they form a unique fingerprint.

  • Cite this

    Hofstadler, C. (2017). Calculation of "normal"construction time for building construction projects whilst considering uncertainties. In J. M. Adam, E. Pellicer, S. Yazdani, A. Singh, & V. Yepes (Eds.), ISEC 2017 - 9th International Structural Engineering and Construction Conference: Resilient Structures and Sustainable Construction (ISEC 2017 - 9th International Structural Engineering and Construction Conference: Resilient Structures and Sustainable Construction). ISEC Press.