|Ph.D Student||Ben-David Albert|
|Subject||Equipment and Site Logistics Planning as Critical Success|
Factors for Multicrane Building Construction
|Department||Department of Civil and Environmental Engineering||Supervisor||Professor Emeritus Aviad Shapira|
|Full Thesis text - in Hebrew|
Tower cranes are the primary piece of equipment dominating the construction scene today. Scrutiny of multicrane (MC) construction sites (mega-sites or mega building projects) located in dense urban areas provokes several questions: (1) Do mega-sites differ from "regular" sites in size only? (2) Are there any unique characteristics that stem from the size of the site and the profusion of cranes? (3) Does the equipment and site logistics planning (ELP) on such sites influence the success of the project? The literature offers no formal definition of the term "mega project"; indeed, the relevant research literature barely even deals with mega building projects, but rather focuses exclusively on mega infrastructure and civil engineering projects. Furthermore, such studies make no reference?either theoretical or practical?to ELP as an important factor that affects the success of large construction projects. The overall aim of the research was to identify, measure, and evaluate the ways in which ELP influences the success of multicrane building projects, where the success of the project is defined according to the extent to which it meets various criteria. The research method is based on an in-depth case study methodology and on an interview guide as the main research tool. The final number of case studies in the research was determined by balancing two opposing research needs: on the one hand, in-depth case studies?a methodology based on depth rather than on breadth, with meticulous selection of cases and learning from the experience of senior project managers and other expert professionals; and on the other hand, a quantitative-qualitative analysis based on a sufficiently large number of cases so as to enable researchers to achieve statistical significance and justify the drawing of generalized conclusion. The findings, analyses, and conclusions yielded insights in two areas: (1) Identification and analysis of the unique characteristics of ELP for multicrane sites; and (2) Quantitative analyses of ELP as a success factor for MC sites. The following applications were developed as part of the research, based on the different findings and analyses: (1) Empirical complexity index (ECI): based on six types of empirical complexities with four intensity levels of influence on the overall complexity; (2) Empirical index of the accumulative effect of ELP on project success (EIEIPS): offers a good indication of the intensity of the effect of ELP on the overall success of the project; (3) Crane planning control parameters (CPCP): may be used during prebid planning to review and even improve crane planning decisions (number, location, radii); and (4) Safety risk potential index (SRPI): enables to estimate safety risks forecast due to tight crane setups and multiple shared-work zones. A major contribution of the research is in bridging an important knowledge gap in two areas: (1) characterization of multicrane construction sites (mega building projects) in terms of ELP aspects; and (2) the effect of ELP on the success of such projects.