Selection of Construction Project Taking into Account Technological and Organizational Risk

Ibadov, Nabi

doi:10.12693/aphyspola.132.974

Cited by 13 publications

(10 citation statements)

References 10 publications

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“…It is not recommended to apply the association analysis to estimate the duration of the project solely (Ahmed et al 2015) but rather as an auxiliary tool assessing the risk level of the chosen solution. The detection of the high risk (the high confidence of the occurrence of the significant delay) should be accompanied by a proposal of the reaction to the high risk detected (Ibadov 2017). The proposed tool suggests the solution by showing the combinations of unfavourable factors causing delays, where the confidence of the significant delay occurrence is much lower.…”

Section: Results Of the Rules Findingmentioning

confidence: 99%

The association analysis for risk evaluation of significant delay occurrence in the completion date of construction project

Anysz

Buczkowski

2018

Int. J. Environ. Sci. Technol.

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It is widely known that a construction project can be described as a success if it is completed on time and without cost overrun. As the strong correlation between delay in completion date of construction projects and cost overruns exists, it is necessary to manage the risk of a delay from the very beginning: even before the start of works execution. The data concerning 139 construction contracts of the highway sections already completed, as well as their completion dates, were collected. The twelve types of data were chosen based on the criterion of time of appearance: they should be known before the start of construction works. Most of the contracts' properties have continuous values, and these had to be converted to the binary values. With the use of the association analysis, it is possible to find the combination of properties of the construction contracts that have produced significant delays in completion date in large part of analysed and already completed contracts. For this purpose, appropriate software has been created. This paper will comprise the software approach to the problem as well as the result of the analysis, as it is based on real data completed. Getting the information on which combination of construction contract properties can cause a significant delay in completion date of the contract, the client can make decisions leading to avoiding risk, i.e. providing better circumstances for project success.

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Section: Results Of the Rules Findingmentioning

confidence: 99%

The association analysis for risk evaluation of significant delay occurrence in the completion date of construction project

Anysz

Buczkowski

2018

Int. J. Environ. Sci. Technol.

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“…This (M-T) conjunction is discrete and proportional, but only in case of a low number of machines. When too many diggers are working at the same time on the limited area, their total efficiency is lower than the efficiency of a single machine multiplied by the number of machines [17]. This finding shows a low practical meaning as the contractors are not equipped with an unlimited number of machines.…”

Section: The Means Of Production and Time Of Work Execution (M-t)mentioning

confidence: 93%

The Conjugated Triangle Method CTM of the detection of inconsistent bids in the construction industry

Anysz

Kaczorek

2018

MATEC Web Conf.

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The existing system of bids evaluation in the construction industry does not bring the clients the certainty if all placed bids comprise real, achievable prices. Especially in the road construction sector, where the earthworks create significant part of the works, comparing e.g. the price of 1 km of roads often gives misleading results. The paper comprises the complete proposal to modify the scope of information provided by offerors in the public procurements (in the construction industry) allowing the clients to determine easily if the contractors have placed the consistent offers i.e. if the bid prices are not too high and if the lowest bid price is not a dumping price. The Conjugated Triangle Method (CTM) of inconsistent bid detection in construction industry is based on the three inter-related parameters: means of production, time of works, on the value of works. Regardless of the offered price it should match the other two parameters.

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“…The possibility of analysis and calculation making depends directly on the choice of the mathematical tool. The fuzzy set theory invented by L.A. Zadeh [26] seems a very good, suitable choice, as it is successfully applied in modelling variety of processes in the construction industry [1], [6][7][8], [12], [20][21][22][23]. Considering the type of the input data, modelling linguistic variables with fuzzy numbersaccording to the author's opinion -is justified.…”

Section: Alternative Net Model With a Fuzzy Decision Node The Core Anmentioning

confidence: 99%

The Alternative Net Model with the Fuzzy Decision Node for the Construction Projects Planning

Ibadov

2018

Archives of Civil Engineering

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The new approach to the construction project planning is presented in the article. The classical net model is enriched by the fuzzy decision node. The decision node allows for alternate choices dependent on appearing circumstances. The alternative net model with fuzzy decision node is an acyclic multi-graph, where some, chosen nodes (events) have multiple connections. These connections represent alternative methods of the certain work execution. Every work (activity) (i, j) in the net model with alternative methods of work execution, despite the basic information comprising the execution time, the cost, the number of necessary workers, should comprise additional information e.g. about a complexity of works, a real feasibility. The alternative ways of a given work execution are evaluated in the decision node based on the fuzzy decision model. Each method is evaluated by assigning it the preference level in a form of the value of the membership function - „equal or higher” μ≥ . The most preferable way of the work execution in a given circumstances, will have the highest value of preference level. When the choice is done the net model is solved in the traditional way. Therefore, the paper concentrates on the process of choosing the method of work execution in the fuzzy decision node. The example calculations accompanying the process of decision taking are presented too. The model requires the use of linguistic variables, a fuzzy numbers, as well as fuzzy preference relations together with some calculations applied the probability theory.

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Selection of Construction Project Taking into Account Technological and Organizational Risk

Cited by 13 publications

References 10 publications

The association analysis for risk evaluation of significant delay occurrence in the completion date of construction project

The association analysis for risk evaluation of significant delay occurrence in the completion date of construction project

The Conjugated Triangle Method CTM of the detection of inconsistent bids in the construction industry

The Alternative Net Model with the Fuzzy Decision Node for the Construction Projects Planning

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