A Multi-Project Scheduling Procedure for Transportation Projects. Final Report (original) (raw)
Related papers
IJERT-Suitability of Linear Scheduling over CPM in Scheduling Highway Projects
International Journal of Engineering Research and Technology (IJERT), 2015
https://www.ijert.org/suitability-of-linear-scheduling-over-cpm-in-scheduling-highway-projects https://www.ijert.org/research/suitability-of-linear-scheduling-over-cpm-in-scheduling-highway-projects-IJERTV4IS030898.pdf Constructions of Highway, Tunneling, Water canal, Pipe Laying, Pavements and Laying of Railway Track are the some of the best examples of Linear Projects. The most adopted technique of scheduling in Construction field is the CPM and PERT. These techniques may also be called as the Conventional Methods of scheduling as these techniques are followed for many decades and most widely followed scheduling technique. Even the most following Scheduling software's like Microsoft Office Project and Primavera are also developed on the basis of CPM. Apart from CPM and PERT special Linear Scheduling techniques are also available which is rarely followed or unnoticed. The Linear Scheduling techniques possess many advantages and merits than the CPM and PERT. Computer Software's are also developed on the basis of Linear Scheduling technique. TILOS is one of the Software developed on the basis of Linear Scheduling technique. In this thesis the typical schedule of a Highway Project is developed in both CPM and Linear Scheduling Technique. The advantage of CPM over the Linear Scheduling Technique is studied. However, the Linear Scheduling is better suitable for simple linear project and not for complicated multiple repeating activities like Multi storey Building etc. In such case the schedule may be developed on both CPM and LSM for better planning.
Automatic schedule integration for highway projects
Automation in Construction, 2003
The construction of a highway/expressway, which involves a complex combination of roads, bridges, and tunnels, is generally separated into several projects. Various contractors thus execute different projects and often apply differing scheduling practices. Since all projects involved in highway construction must be completed for the highway to be useful, the management of the various projects should preferably be integrated. To assist project controllers in schedule integration, this study proposes algorithms based on standardized codes and network modules. A computer system was also designed to help contractors use these modules for scheduling, and ultimately to let project controllers combine these schedules electronically. A questionnaire survey and industry feedback revealed the potential benefits of using the proposed algorithms for generating and integrating schedules, respectively. Contractors' computation capabilities must be improved before the proposed scheduling algorithms can be fully implemented.
Linear Scheduling Analysis Toolkit for Road and Airports Construction Projects
2016
The Linear Scheduling Method (LSM) is the most effective scheduling tool to use in linear projects. Computer programs have been developed for various scheduling techniques such as Bar Chart, PERT and CPM. There are not many commercially available toolkit for LSM and this lack of toolkit is one of the reasons for its limited usage. The product of this research is a toolkit comprised of models, procedures and tools that allow for implementation of the linear scheduling method. This toolkit is able to calculate the controlling activity path of such schedules, to level the resources of a project scheduled and to print reports of the status of the schedule. The paper describes the toolkit that was developed by the research, its documentation and example for an Italian case study that was scheduled using this prototype.
Better Construction Project Management through Better Scheduling
2018
The contents of this report reflect the views of the authors who are responsible for the facts and the accuracy of the data presented herein. The contents do not necessarily reflect the official views or policies of the South Carolina Department of Transportation or the Federal Highway Administration. This report does not constitute a standard, specification, or regulation. vi
Guidelines for Developing and Reviewing Baseline Schedules for Wyoming Transportation Projects
North Dakota State University - Upper Great Plains Transportation Institute, Fargo: Mountain-Plains Consortium, 2022., 2022
Due to the short construction season in Wyoming, contractors must complete many transportation projects on a tight schedule. Unfortunately, contractors often cannot create accurate schedules considering logical work ordering, reasonable productivity, and weather events. Inaccurate baseline schedules can be problematic for progress monitoring and lead to costly schedule slippage. Therefore, this project reviews the current practices and standards used by several departments of transportation (DOTs) and the US Government Accountability Office (GAO) to improve baseline schedules. Afterward, the research team collected baseline schedules and daily work report (DWR) data to identify issues and causes of schedule delays in the State of Wyoming. The DWR data make up a rich dataset that includes the construction activity’s actual start and end dates. Therefore, the researchers determine the existing workflow and causes of delay. Additionally, the research team created an as-built schedule based on the DWR data for one project to evaluate the accuracy of baseline schedules. Moreover, this project compares baseline schedules and the GAO best practices for project schedules. The research team also conducted a questionnaire survey targeting resident engineers in Wyoming to identify schedule delay causes. Finally, the research team developed recommendations to improve baseline schedules and the DWR’s documentation process to ensure future realistic implementations.
This study presents the effectiveness of scheduling techniques in the success of mechanical construction projects as an essential tool for project planning, implementation, evaluation and control. Improper project resources scheduling leads to time and cost overruns, hence leads to a huge variation. This work focused on scheduled and unscheduled sets of constructed silo tanks. The analyses were based on the combination of scheduling techniques (CPM & Gantt chart) with the aid of Microsoft Project for the scheduled project sets, as these techniques helped in evolving a planned activity resource cost. The corresponding results of the implemented scheduled projects were related to cost per day and their performance evaluated based on earned value analysis. The scheduled and unscheduled project set results were analyzed based on the test of the null hypothesis using F-Test for the equality of variance. Research findings shows that, the combination of scheduling techniques were effective in reducing variance within the scheduled project set, while the earned value analysis exposed the minor variance which existed, the variance were not sufficient to deter the project success. The F-test upturned the null hypothesis and upheld the alternative hypothesis which stated that variance in unscheduled project were greater than those in scheduled project.
Schedule Estimates for Preconstruction Activities of Highway Projects-Review of The Literature
The Open Transportation Journal, 2019
Among the multiple causes of project success in construction of big projects (such as highway projects), punctually delivering of preconstruction activities is increasingly recognized as a quite frequent cause that has not received adequate amount of attention. In this research, after providing an introduction about the different phases and activities in a construction project, the reasons behind the importance of preconstruction activities is briefly summarized. Scheduling of these types of activities is complex in nature mostly because of the unclear path toward delivering them; therefore, inaccurate scheduling of them is common. Since it is a very demanding and difficult responsibility to organize the literature efficiently, the literature is classified into five different groups to accelerate this effort; These groups are environmental clearance, design, right-of-way acquisition, utility adjustment, and finally advertising and letting; In this research, these categories and thei...
Production based scheduling method for linear construction in road projects
Ksce Journal of Civil Engineering, 2014
Scheduling of road projects has always been a challenging endeavor in the construction industry as project durations are quite often unpredictable. It depends on the production rates of individual activities which are governed by factors such as availability of resources, environmental and geographical conditions. The current trend in road project scheduling is based on productivity of a certain item of work with a defined crew as resource. Practically, as these production rates are not achieved as per plan, an attempt has been made in this work to propose a simple model to estimate road project durations utilizing probable production rates of activities. A simulation model attempted to arrive at probable production rates of these activities has indicated a wide range of values that cannot lead to accurate time estimates. A more specific range of production rate estimates have been arrived adopting Delphi process to account for factors mainly within the purview of constructors. The basic framework for time estimates has been proposed by adopting Linear Scheduling Method (LSM) for scheduling due to limitations of network techniques in road works. A simple flowchart model of the time estimate method has been presented incorporating probable production rates defining crews and buffer distances.
Comparative Study of Critical Path Method and Linear Scheduling Method for Highway Road Construction
Technological University (Myitkyina), 2018
A well-planned construction schedule not only helps in outlining the pace of work but also how the work will get done. Two different kinds of project scheduling methods are employed for a sample road construction project; Critical Path Method (CPM) and Linear Scheduling Method (LSM). The aim of this study is to briefly evaluate and compare network programming techniques and linear scheduling techniques for a sample road construction project, by comparing Critical Path Method (CPM) and Linear Scheduling Method (LSM).
Model for Analysis of Factors Affecting Construction Schedule in Highway Work Zones
Journal of Transportation Engineering, 2006
In highway construction, it is not only important to understand the factors that affect the schedule but also to evaluate their probable severity and impact on project duration. However, there is currently no standard or accepted model existing in the industry that can be used for this purpose. This paper presents a model that identifies various factors which have a potential to influence and impact the construction schedule in highway work zones. Also, a stochastic analysis of those factors is conducted by the model to determine probable changes, i.e., reduction or escalation, in the original estimated schedule for a given project. The analysis offers a revised schedule that is bound to be more meaningful and close to the expected value. The state Department of Transportation cannot only use the results to improve project scheduling but also improve the user cost calculations and decisions regarding contract types and requirements, e.g., liquidated damages, penalties, and incentives/disincentives.