CoreConferences 35 International Conference on Architecture and Civil Engineering 2018 ISBN 978-81-933584-5-0 VOL 01 Website www.coreconferences.com eMail mail@coreconferences.com Received 15 – January – 2018 Accepted 05 - February – 2018 Article ID CoreConferences010 eAID CoreConferences.2018.010 Resource Leveling Considering F loat Consumption Impact Dae-Young Kim 1 , Byoung-Yoon Choi 2 , Dong-Eun Lee 3 1 Professor, Dept. of Architectural Engineering, Kyungnam University, Korea 2 Graduate, 3 Professor, School of Architecture & Civil Engineering, Kyungpook National University, Korea Abstract- Resource levelling minimizes resource fluctuations by postpone the earliest start time (EST) of non-critical activities with corresponding floats. Float consumption for resource leveling may reduces the project completion probability. This paper presents a method to minimize the resource fluctuations with minimum impact of float consumption. A case study is presented to verify the validity and usability of the method. I. Introduction The purpose of the resource leveling in a construction project is to reduce the project completion time (PCT) and the project completion cost (PPC) by reducing the hire, release and re-hire of resources (i.e., labor, equipment). Existing resource leveling studies have adopted a method of minimizing resource fluctuations by synchronizing the resource accumulation graph with the resource requirements (Essa, 1989; Senouci & Eldin 2004) and by making it closer to the bell-shape (Mattila and Abraham 1998; Yeniocak 2013). Previous studies have achieved resource leveling by delaying the start time of activity within the float range (Keane and Caletka 2015). This resource leveling method does not affect the project completion time because it uses the float that exists in non-critical activities. However, the consumption of float due to the start time delay of activity increases the criticality index of the non-critical activities. The increase in the criticality index reduces the probability of project success due to the uncertainties of the construction project and unexpected risks. Therefore, scheduling for a successful project should ensure flexibility and sustainability of the employment status to cope with uncertainty. In this study, we propose a resource leveling method that identifies the activities with little effect on the probability of project success, uses them for resource leveling, and identifes the start time combination of each activity considering the ratio of critical activities. Figure 1. Resource accumulation graph This paper is prepared exclusively for CoreConferences 2018 which is published by ASDF International, Registered in London, United Kingdom under the directions of the Editor-in-Chief Dr A Senthilkumar and Editors Dr. Daniel James. Permission to make digital or hard copies of part or all of this work for personal or classroom use is granted without fee provided that copies are not made or distributed for profit or commercial advantage, and that copies bear this notice and the full citation on the first page. Copyrights for third-party components of this work must be honoured. For all other uses, contact the owner/author(s). Copyright Holder can be reached at copy@asdf.international for distribution. 2018 © Reserved by Association of Scientists, Developers and Faculties [www.ASDF.international]