impact of 4d modeling on construction planning process - Chalmers ...

More documents

Recommendations

Info

exceptional tool to solve the problems that might arise during construction phase like; trade flows, work conflicts, material lay down areas and move in and move out <strong>of</strong> material and labor force before the actual start <strong>of</strong> construction (Dixit, 2007). In addition to this, 4D <strong>modeling</strong> also reduces the misunderstandings between various parties involved in construction project. Due to its significant potential benefits in the construction industry, 4D concept has attracted many researchers to develop its potential in the past decade (Wanga, Zhanga, Chaub, & Anson, 2004). 1.2 Problem description Construction planning is a challenging and essential activity in the execution and management <strong>of</strong> construction projects (Hendrickson, 2000). According to Chevallier & Russell cited in (Heesom & Mahdjoubi, 2004), effective planning is one <strong>of</strong> the most significant aspects <strong>of</strong> a construction project and the success <strong>of</strong> the project is greatly influenced by it. However, Kelsey cited in (Heesom & Mahdjoubi, 2004) stated that emerging evidence indicates a shortage <strong>of</strong> skill in the construction planning area, with a decreasing number <strong>of</strong> experienced planners having the ability or knowledge to effectively plan construction projects. A wide range <strong>of</strong> planning methodologies have been researched and implemented but they are not qualified enough to satisfy the desire <strong>of</strong> construction parties. There is still an enormous disparity between execution and plan (Allen & Smallwood, 2008). The construction plans are usually being generated by a computer based tool as 2D charts or drawings from a long period <strong>of</strong> time with the absence <strong>of</strong> spatial features <strong>of</strong> actual construction (Wanga, Zhanga, Chaub, & Anson, 2004). Activity based critical path method (CPM) is the most used technique to schedule the construction process these days. Construction planners split up a project into a number <strong>of</strong> small activities and each activity is included in the bar chart and a network which represents the proposed schedule <strong>of</strong> the project (Jongeling & Ol<strong>of</strong>sson, 2007). The computer based CPM scheduling has helped the construction planner to plan the construction tasks efficiently. However, the major disadvantage <strong>of</strong> a CPM network is in the development <strong>of</strong> correct sequencing alternatives. This process usually relies on how delays and priorities are identified which heavily depend upon the experience and instinct <strong>of</strong> the scheduler/planner (Dixit, 2007). According to Akbas cited in (Jongeling & Ol<strong>of</strong>sson, 2007), another difficulty in the use <strong>of</strong> CPM scheduling for construction planning is 2 CHALMERS, Civil and Environmental Engineering, Master’s Thesis 2012:27
linked to the spatial configuration <strong>of</strong> project. The spatial configuration <strong>of</strong> each construction project is unique and constitutes an immense foundation <strong>of</strong> planning decisions. The CPM schedule fails to provide enough information regarding the spatial configuration and complexities <strong>of</strong> the project components (Koo & Fischer, 2000). Therefore, the user has to look at 2D drawings and conceptually connect the components <strong>of</strong> the building with the related activities from the CPM schedule to identify the spatial aspects <strong>of</strong> a project. Analyzing detailed CPM schedules in combination with 2D drawing might lead to a complex process, which limits the possibility to identify problematic sequences, mistakes and opportunities. Conflicting interpretations <strong>of</strong> the schedule might be developed by different project members when viewing the 2D drawings and CPM schedule. This in turn might lead to ineffective communication among different project participants (Jongeling & Ol<strong>of</strong>sson, 2007). In parallel to the construction schedules, many construction enterprises build 3D models with the aid <strong>of</strong> widely used CAD applications for their projects. However, those 3D models cannot display the exact status <strong>of</strong> a project at a specified time but can only provide static images. The data integration between the schedule information, 3D model and other information is not present. Without the visualization <strong>of</strong> the construction progress at the construction site as the time elapses, planners must rely much on their experience, imagination and judgment to perceive data from paper based documents and come up with the appropriate method <strong>of</strong> construction, thus receiving minimum benefit from the computer (Wanga, Zhanga, Chaub, & Anson, 2004). All such circumstances might affect the performance <strong>of</strong> the construction projects adversely. The construction industry needs to consider the use <strong>of</strong> technology to improve working practices and efficiencies in order to make construction more attractive to both investors and potential recruits. Given that planning has a significant <strong>impact</strong> on the ability <strong>of</strong> any organization to achieve this, the focus <strong>of</strong> their attention should be on using technology to improve the construction planning process (Allen & Smallwood, 2008). 1.3 Purpose and Research questions This thesis is aimed to study different aspects <strong>of</strong> 4D technology and to find out its <strong>impact</strong> on the performance <strong>of</strong> the construction planning, and how to benefit most from CHALMERS, Civil and Environmental Engineering, Master’s Thesis 2012:27 3
Page 1: IMPACT OF 4D MODELING ON CONSTRUCTI
Page 4 and 5: Impact of 4D Model
Page 7 and 8: Contents 1 INTRODUCTION 1 1.1 Backg
Page 9: Preface This master’s thesis has
Page 16 and 17: this technology to address the most
Page 18 and 19: or reports, then reorganizes or com
Page 20 and 21: 3.1.1 Construction planning aspects
Page 22 and 23: (Nunnally, 2007). An example <stron
Page 24 and 25: 3.2 4D BIM 3.2.1 Introduction to BI
Page 26 and 27: the project, BIM can be used by the
Page 28 and 29: production rate and location in the
Page 30 and 31: 3.2.4.1 4D Modeling Processes Varie
Page 32 and 33: 3.2.4.2 4D Planning and Scheduling
Page 34 and 35: 3.3.1 Case study 1 (Kymmell, 2008)
Page 36 and 37: Figure 0-11: Percent plan complete
Page 38 and 39: information and gave precise quanti
Page 40 and 41: In this project, transformation fro
Page 42 and 43: two following processes which invol
Page 44 and 45: Figure 0-17: Hit Rate (%) Analysis
Page 46 and 47: Table 0-1: Usefulness of</s
Page 48 and 49: Figure 0-18: Three different screen
Page 50 and 51: utilization of 4D
Page 52 and 53: 4.1.1.6 Accurate quantities take<st
Page 54 and 55: separately the updating task <stron
Page 56 and 57: common problems faced in the constr
Page 58: Kymmell, W. (2008). Biliding inform

impact of 4d modeling on construction planning process - Chalmers ...

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?