Application of Fuzzy Assignment Model in the Construction Industry
Nikita More and Satish Waysal
The construction industry needs an efficacious decision making at various stages as huge financial investments are admitted. The assignment model is a very effective tool for decision making in various fields. Therefore, it can also be used in the construction industry for optimum utilization of resources, especially construction materials. This study seeks to solve the problem of material supplier allocation in case of uncertainties like availability issues and cost fluctuations. The study presents a fuzzy assignment model for assigning the suppliers to a construction project to minimize the cost. The application is demonstrated by considering four cases pertaining to a construction project. Each fuzzy cost is considered as a triangular fuzzy number. According to Jahirhussain and Jayaraman (2013), Robust's ranking technique is used to defuzzify the triangular fuzzy numbers to get crisp numbers. The optimal allocation is obtained using the Hungarian method. The implementation of the fuzzy assignment model resulted in a substantial cost reduction in the construction project. In the end, a comparison is presented for the cost of materials obtained with and without the use of the fuzzy assignment model.
Fuzzy Assignment Model, Robust Ranking Technique, The Hungarian Method, Supplier Allocation, Construction
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Research Articles
Cost Performance of Public, Private, Partnership (PPP) Road Projects in India
Modish Kumar and Santosh Kumari
The Purpose of this paper is to identify the best Public-Private-Partnership (PPP) model in terms of cost performance for road projects out of four variants Build-OperateTransfer (BOT), Build-Own- Operate-Transfer (BOOT) and Design-Build-FinanceOperate-Transfer (DBFOT). The methodology adopted in this paper is an analysis of secondary data on public-private-partnership road projects and testing the hypotheses claim for the difference in cost performance among groups by performing Analysis of Variance (ANOVA) posthoc test. The study is limited to the four variants of PublicPrivate-Partnership (PPP) road projects and suggests the best variants out of those four. Other parameters of project performance like time, social benefits, etc. are not considered in this paper. The paper compares the cost performance of 450 Public, Private, Partnership (PPP) road projects categorized based on the PPP model type and size of the project. This paper is an attempt to study the cost parameter of PPP infrastructural road projects in India. The paper investigates how frequent project cost overrun happens in road projects in India and also identifies the best performing PublicPrivate-Partnership (PPP) for roads
Cost, Performance, PPP, BOT, BOOT, DBFOT
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Research Articles
A Critical Review of Risk Factors and Reliability Assessment Issues of Fire and Life Safety in Buildings
Kuldeep Kumar and Virendra Kumar Paul
With the advancements in building technology, the complexity of fire hazards, and vulnerability factors have increased manifolds, resulting in substantial loss of lives and property. In a typical practice of fire safety, the focus tends to be on compliance with the minimum statutory requirements such as the provision of fire protection measures, provision of egress, compartmentation, and smoke control. Despite statutory compliances and proactive initiatives, there is an issue of reliability that would vary depending upon the extent of responsibility owned by the beyond codes and best practices. This paper aims to identify and assess the risks that pertain to the reliability of life and fire safety measures undertaken in a given context so that the performance reliability can be established for monitoring and improvement during various stages of the building life cycle. This should lead to the development of fire risk and reliability assessment protocol considering determinants such as building occupants, current and future functioning of the building, building facilities management system, and obsolescence status of building engineering systems, including those related to life and fire safety. This paper focuses on the identification of fire risk factors and establishing the reliability issues in the buildings
Fire Risk; Risk Analysis; Reliability Assessment; Risk Factors; Reliability Issues
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Research Articles
Modal Pushover Analysis Based Seismic Fragility Analysis for Torsionally Stiff Reinforced Concrete Building
Salunkhe M.S., Tande S.N. and Patil V.S.
The focus of the study is to develop seismic fragility curves for torsionally stiff RC buildings using the Modal Pushover Analysis (MPA) procedure. A methodology for fragility analysis by MPA procedure has been developed using past literature references. This methodology has studied fifteen storied torsionally stiff RC buildings for probabilistic seismic performance assessment. In the MPA procedure, each mode is treated as a separate mode, and the capacity of the structure has been estimated modewise known as the modal capacity of the structure. The median capacity of various damage states has been estimated from the building model capacity curves and then, it is combined using the modal combination principle. Fragility curves were also been developed for different damage states using conventional pushover analysis and the results are compared with the results from the MPA procedure. The study concludes that for torsionally stiff buildings, the pushover method provides more conservative results than the MPA approach since it ignores the capacity in higher modes, hence it is highly unreliable.
Identifying Delay Attributes and Attributable Parties Influencing the Construction Schedule Performance of Hydroelectric Projects in the Indian Scenario
Krishnachandran VN and Sudhakumar J
This study aims to identify the numerous attributes which delay the construction of hydroelectric projects in India. This study is of utmost importance because no prior study has particularly examined delays and associated issues in the Hydro-Electric Project industry. The results of a questionnaire survey of Contractors, Clients, Consultants, and Sub-Contractors are presented in this study. Delay in issuing Good for Construction Drawings is one of the top attributes acknowledged to have a considerable impact on project delivery delays. Delay due to interfacing of activities, Delay owing to late handover of E & M Contractor, Non-availability of an unencumbered right of way to the project site and Frequent revisions to Good for Construction Drawings are cited as the cause. The findings provide a better understanding of the attributes that contribute to the delayed commissioning of Hydro Electric Projects in India and will aid construction parties and project management professionals in implementing effective corrective measures to ensure the timely completion of Project works.
Construction Project Management; Construction Delay Attributes; Scheduled Performance; Severity Index; Hydroelectric Projects.
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