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The Influence of Construction Works Disturbances on the EVM Analysis Outcomes – Case Study

A. Starczyk-Kołbyk L. Kruszka
Archives of Civil Engineering | Vol. 66 | No 1 | 161-177 | DOI: 10.24425/ace.2020.131781
Keywords building disturbances delays in construction works schedule changes contractual penalties EVM method
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Abstract

The paper presents the problem of building disturbances, which are usually an inseparable element during the implementation of construction projects. They were classified, their causes and sides of the construction process responsible for their creation were identified on the basis of the analyzed construction investment. In addition, using the Earned Value Management method, the scale of delays arising in construction works and the related effects were determined. The important role of close cooperation and good communication between all participants of the construction process was emphasized, which would reduce the phenomenon of building disturbances, but also mitigate the negative effects of delays that have already occurred.

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Authors and Affiliations

A. Starczyk-Kołbyk
L. Kruszka

Use of the EVM method for analysis of extending the construction project duration as a result of realization disturbances - case study

Anna Starczyk-Kołbyk Leopold Kruszka
Archives of Civil Engineering | 2021 | vol. 67 | No 3 | 373-393 | DOI: 10.24425/ace.2021.138061
Keywords EVM method realization disturbances delays in construction works
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Abstract

In pursuing numerous construction projects, investors and contractors regularly face construction delay problems, many of which are likely to have been avoidable. There is found that payment delays and project delays are the two most critical effects of risk factors of construction management. The paper presents the practical application of the Earned Value Management method, which was used to estimate the possible extension of the duration of construction works during which realization disturbances occurred on the example of selected construction investment. The realization disturbances are usually an inseparable element in the implementation of construction works. They are the result of, among others: additional works, changes or design defects, as well as a badly adopted logistics strategy regarding the supply of construction materials. Delays or increasing the total cost of investment is a problem often encountered in the implementation of construction investments, despite advanced construction technologies, including system technologies and proven tools supporting the management of the construction process. The EVM method is used to control investments. It allows you to control delays and acceleration of construction works as well as to estimate their cost and completion date. In the analyzed case it was used to determine the scale of delays arising in construction works and related effects with the specification of the participation of individual participants of the investment process for delays. This paper is a continuation and supplementation of the research presented in the article: “The influence of construction works disturbances on the EVM analysis outcomes – case study” [23].
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Bibliography


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Authors and Affiliations

Anna Starczyk-Kołbyk
1
ORCID: ORCID
Leopold Kruszka
2
ORCID: ORCID
  1. Military University of Technology, Faculty of Civil Engineering and Geodesy, ul. gen. Sylwestra Kaliskiego 2, 00–908 Warsaw, Poland
  2. Military University of Technology, Faculty of Civil Engineering and Geodesy, ul. gen. Sylwestra Kaliskiego 2,00–908 Warsaw, Poland

Randomized Earned Value Method for the rolling assessment of construction projects advancement

Tadeusz Kasprowicz Anna Starczyk-Kołbyk
Archives of Civil Engineering | 2022 | vol. 68 | No 2 | 501-520 | DOI: 10.24425/ace.2022.140655
Keywords construction project duration cost advancement rolling assessment
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Abstract

The Randomized Earned Value Method enable to control the time and cost of works during the implementation of a construction project. The method allows to assess the compliance of the current advancement in time and actually incurred costs with the adopted plan. It also allows to predict the date and amount of the project completion costs. Individual assessment indicators (BCWS, BCWP, ACWP) are calculated after the ongoing control of the progression of works. In the case of randomly changing of implementation conditions, the calculated in this way values of the indicators may be unacceptable because of overlarge differences in comparison to actual values. Therefore, it is proposed an EVM enhancement and additional risk conditions analysis. In this approach data from the quantity survey of works are randomized based on analysis of variations between actually measured and planned values of duration and cost of implemented works. It is estimated the randomized values of individual indicators after successive controls of the progress of works. After each project advancement control the duration and cost of the works that remain to be performed are estimated. Moreover, new verified overall time and total cost of the project implementation are also estimated. After the last inspection, randomized values of the final date and total cost of completion of the project are calculated, as well as randomized values of time extension and total cost overrun. Of course, for randomized values, standard deviations of individual quantities are calculated. Therefore, the risk of time and the risk of cost of the project implementation are presented in the risk charts. The proposed approach provides a better assessment of the progress of works under risk conditions. It is worth to add that the method does not require significant changes to the typical construction management process, however, it ensures realistic consideration of the influence of random factors on the course and results of individual works and the entire project.
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Authors and Affiliations

Tadeusz Kasprowicz
1
ORCID: ORCID
Anna Starczyk-Kołbyk
1
ORCID: ORCID
  1. Military University of Technology, Faculty of Civil Engineering and Geodesy, ul. gen. Sylwestra Kaliskiego 2, 00–908 Warsaw, Poland

Application of the Randomized Earned Value Method to assess the advancement of the construction of the office building under the unstable implementation conditions

Tadeusz Kasprowicz Anna Starczyk-Kołbyk
Archives of Civil Engineering | 2024 | vol. 70 | No 1 | 167-197 | DOI: 10.24425/ace.2024.148906
Keywords construction investment duration cost risk randomization project management
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Abstract

The REVM method is a modernized option of classical EVM method. The new method has been developed for applying in unstable condition of works implementation. When the works can be accidentally disturbed and the impact of random disruption factors on course and results of works must be taken into consideration. Next, Randomized Budgeted Duration to Completion and Randomized Budgeted Cost to Completion that is duration and cost of works remaining to execution after each inspection, as well as the Randomized Budgeted Duration at Completion and Randomized Budgeted Cost at Completion that is duration and cost of all works of the project completion after the site inspection. Moreover, the risk of durations and costs overrun of works are evaluated. It is important that input data required for the REVM method are the similar and are measured in the same way as in typical control of advancement works. But results of the application consist new decision information. Control of the investment under deterministic conditions, without taking into account the risk of disruptions, resulted in a final deviation from the planned budget of over 7%, and from the planned completion of the investment by almost 12%. Without analysing the factor related to disruptions at the investment implementation stage, the material and financial schedule was completely outdated. On the other hand, when controlling the investment under risk conditions and introducing organizational and technological changes adequate to the inspection reports, the final deviation from the planned budget was less than 2%, and slightly more than 2% from the planned completion date. Researches confirm that the results received by using the REVM method well reflect real situation of works implementation.
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Authors and Affiliations

Tadeusz Kasprowicz
1
ORCID: ORCID
Anna Starczyk-Kołbyk
1
ORCID: ORCID
  1. Military University of Technology, Faculty of Civil Engineering and Geodesy, ul. gen. Sylwestra Kaliskiego 2, 00–908 Warsaw, Poland

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