A framework for delay analysis method selection

2022 Stratigea DomnikiStudent: Domniki Stratigea
Year: 2022
Affiliation: National Technical University of Athens/Athens University of Economics and Business
Level: Postgraduate
Thesis written in Greek


Delay claims in the construction projects consist one of the main reasons for dispute between the parties of the Contract. One of the significant factors is the lack of a defined global or local accepted method that will be used for the delay analysis. In this thesis an attempt was made to develop guidelines and to create a framework for selecting the most appropriate delay analysis method. The CPM based methods which were analyzed are the "impacted as planned", the "as planned but for", the "Window Analysis", the "collapsed as built", the "as built vs as planned" and the "TIA". Following the analysis and the comparison of these methods, their special characteristics were evaluated based on which the parameters were determined for the selection of the most suitable method. These parameters were related to the timing of the delay analysis, the required resources to perform this analysis, the process of the analysis and the record availability of the project. Finally, this framework has been applied to a hotel project following any modifications deemed necessary to serve the purpose of the thesis with the aid of the software MS project.
According to the results of the analysis, the simplest method is the "as planned vs as built" which is a retrospective and observed method. The required schedules for its implementation are the "as planned" and the "as built" schedules. The second simplest method id the "Impacted as planned". The "window analysis" and the "TIA" methods are the most complex and expensive methods as they require significant cost of resources and detailed project documentation. These methods take into account the project progress at the time of analysis. The methods "impacted as planned", "as planned but for", "Window Analysis "and" TIA "are additive methods and the "as planned" schedule as well as the intermediated updated schedules are required for their implementation. If the analyst decides to add into the schedule delays related only to one party the methods that should be used are either the "as planned but for" or the "collapsed as built". It is noted that the latter is usually more accurate and it is the sole method that requires only the "as built" schedule.

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