Development of work breakdown structure (WBS) dictionary for the construction works of lower structure steel bridge

Abstract

The lower structure of a steel bridge is one of the essential elements of a whole steel bridge structure. The construction works of this structure are complex and extensive. In the process of planning the construction works for this element, thorough and well-designed plan is vital in order to avoid construction failures or defects that could lead to project failure. Therefore, in the construction planning process for the lower structure steel bridge, a detailed construction process and activities, including its resources are needed for guiding the process effectively and comply with the project requirements. The decomposition of the construction works into work packages is important to minimize mistakes, which is by using a definitive work breakdown structure (WBS) and its detailed dictionary for each work packages. The objective of this study is to develop the WBS dictionary based on the defined WBS, for each construction work elements in the lower structure steel bridge. The study used Delphi method and expert validation as its methodology. The result provides the WBS dictionary that specifies the construction works of lower structure steel bridge into four (4) levels of WBS and two (2) supplementary levels of detailed activities and resources.