Development Of Risk Index Through Modified Analytic Hierarchy Process (MAHP) Tool for Elevated Corridor Metro Rail Project
Debasis Sarkar and H.B. Raghavendra Manvinder Singh and Parth Shah
Construction of complex mega infrastructure projects like elevated corridor construction for metro rail operations involves risks and uncertainties throughout all phases of the project starting from feasibility through design, development, execution and operation. These risks are responsible for project time and cost over-run. The feasibility of successful completion of the project within stipulated time and cost frame also drastically reduces. Considering the above fact, this paper is an attempt to develop a model for computation of risk index of the major identified risks pertaining to the “quality”, parameters associated with the construction of an elevated corridor metro rail project by application of “Modified Analytic Hierarchy Process (MAHP)”. Similar methodology can be adopted for developing the risk index for “safety” and “environment” parameters. This risk index developed on the basis of the severity of the risks would enable the project authorities to formulate mitigation measures which are absolutely necessary for minimization of the risk components in the major activities of the project under study.
Risk index, Multi Criteria Decision Making (MCDM), Modified Analytic Hierarchy Process
(MAHP), Elevated corridor, Metro rail
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Research Articles
Innovative Options For Design And Construction Of Passenger Transfer Marina For An Offshore Casino
C. S. Gokhale
The state of Goa is an international tourist destination. It is famous for its beautiful beaches. Goa is the only state in Union of India where offshore casino operations are permitted. At present Goa has more than 12 onshore casinos and more than 6 offshore casinos. Most of these offshore casinos are anchored in river Mandovi at the state capital Panaji. Thus, offshore casinos require a terminal point at river side for receiving the tourists and transferring them to casino in small passenger vessels called ferry boats. To facilitate this transfer by ferry boats, a small jetty, commonly referred as marina is required. This paper discusses various alternatives for design and construction of passenger transfer jetty for an offshore casino anchored in river Mandovi.
Casino, Marina, Retaining wall, Piles, Precast
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Research Articles
Selection Of Sub-Contractors Using Multi Criteria Decision Making Tools
M. P. Venkatesh and G. Mohankumar
The growing importance of sub-contractor selection criteria is gaining interest in the construction industry. The current selection process typically emphasizes on the lowest tender price which eventually leads to the false economy of the project. There is a serious outcry in the construction industry demanding a revolution in the tender awarding system for sub-contractors as it has significant impact on the success of the project. This study has been carried out to justify that the selection of sub-contractors should not be based on lowest bid price alone but should also consider other parameters such as cost, quality and time. The current selection process is performed in an un-structured intuitive manner with considerable reliance on the experience of procurers and their judgment. The procurers can no longer depend totally on their past experience to decide the appropriate sub-contractor, because the nature of selection process which involves multi- criteria decision skill has become more complex. In response to the need for a robust sub-contractor selection system, there is need for development of a theoretical model based on multi-criteria decision making tools for the selection of sub-contractors. The methodologies like Multi-attribute utility theory and Analytical hierarchy process have been used to develop a model to choose sub-contractors considering the selection criteria. This work is an initiative to identify and capture knowledge, logical relations, and heuristic rules used by decision-makers, as well as to embody them in a decision support tool as a way of assisting and automating the processes of sub-contractor selection for projects. The incorporating of subjective, qualitative, and quantitative information into a knowledge based system adds more dimensions to enhance the credibility of the overall process for sub-contractor selection.
Sub-contractor selection, Multi-criteria decision making, Analytical hierarchy process
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Research Articles
Evaluation Of The Pune Metro Rail Project Using The Minimum Spanning Tree (MST) Model
Milind Jagtap and Parida Ratri
The city of Pune is thriving with stupendous growth by virtue of its industrial growth and its rich cultural heritage. The ever increasing demand for public transport has pursued the Pune city since long. However, a well-established public stransport system could be a reality with the launch of the Pune metro project. Though it is a good news for the city, the people of Pune are anxious about the locations of the metro stations in their neighbourhood, while the Pune Municipal Corporation is worried about the project cost. A tentative route plan of the metro is published in a newspaper. In total, 30 metro stations are proposed. The length of the track to be laid is a key decision variable, affecting the total cost of the project. Further, the land acquisition cost is likely to increase the project cost. The stations of the corridors 1 and 2, near the central part of the city are used to develop the Minimum Spanning Tree (MST). Further, in order to develop a more realistic MST, the Multi Criteria Minimum Spanning Tree (MCMST) approach is used. In MCMST, the first criterion of the minimum track length is considered, while the land acquisition cost is set as a second criterion in this research. The study intended to find out, firstly how the MST changes based on a single individual criterion, secondly, how the MST changes based on the bivariate objective of the minimum track length and minimum land acquisition cost.
Track length, Project cost, Routes, and Land acquisition cost
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Research Articles
Constraint Satisfaction : The Criteria For Real Time Project Scheduling
S. R. Kannan , B. Kasiviswanathan and T. Janani
Construction projects have a fixed set of objectives which aim at the successful completion of a project in a constraint scenario. Each project is unique which includes different resources such as workforce, materials and equipment. A project involves a complex set and relationship of activities striving to satisfy three major requisites - time, cost and quality. This has made construction planning a primary challenging activity in management and implementation of construction projects. At the root, it comprises of choice of technology, definition of tasks, estimation of required resources and durations for individual tasks and identification of interactions among the different work tasks. A well designed construction plan is the basis for developing a project budget and schedule for various activities in the project. Determination of the activity time, based on a construction plan poses yet another challenge as the durations are never deterministic as assumed in CPM based schedules. Activities constantly experience various types of constraints and hence the earliest time and latest time of activities take different values as per actual precedence/succession relationships. Identifying and solving the project constraints in a practical construction scenario is one of the most testing tasks in the construction scheduling process. CPM based methods have proved to be inadequate for such variability in real-life construction projects and hence the Constraint Satisfaction Scheduling Method (CSSM) has been proposed as a possible scheduling method to address the issue of constraint satisfaction. The method is based on Constraint Satisfaction Problem (CSP) that represents entities in a problem as a homogeneous collection of finite constraints over variables and solved by constraint satisfaction methods. A case study of a schedule of a residential project incorporating stage-wise time, precedence, decision and resource constraint has been presented in this work to provide effective generation of practical and valid project schedules.
Construction projects, Constraint satisfaction, Scheduling, Project management
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