User talk:Shakibzohrehvandi

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Publish date: 21 April 2020:

 A project buffer and resource management model in energy sector; a case study in construction of a wind farm project .

In order to increase safety in project implementation in the face of possible and unpredictable events, time buffers will be placed in different parts of the project and activities to prevent the negative effects of fluctuations in activities on the project's critical chain which will otherwise lead to a delay in the whole project. Three types of buffers are used, called the Project Buffer, Feeding Buffer, and Resource Buffer. The project buffer is placed at the end of the project's critical chain to maintain the project delivery date. Buffer sizing can be considered as the most important measure in implementing the critical chain scheduling, because if short buffers are allotted, we will need to re-schedule the project repeatedly until the end of the project, and if long buffers are allotted, all concepts used in scheduling will be violated. Usually, there is no control and monitoring over the consumption of buffers by project activities in the methods proposed by previous studies. Also, one of the major problems with projects is that they are not completed according to schedule and this creates time delays and losses in the implementation of projects. Today, as projects in the energy sector, especially renewable projects, are on the increase, and also we are facing resource constraint in the implementation of projects, using scheduling techniques to minimize delays as well as obtain more realistic project duration is necessary.

This study aims to introduce an efficient project buffer and resource management (PBRM) model for project resource levelling and project buffer sizing as well as controlling of project buffer consumption of a wind power plant project in order to achieve a more realistic project duration. The methodology of this research consists of three main phases. In the first phase of the research methodology, resource leveling is done in the project and resource conflicts of activities are identified. In the second phase, the project critical chain is determined, and the appropriate size of the project buffer is specified. In the third phase of the methodology, buffer consumption is controlled and monitored during the project implementation. After employing the PBRM method, the results of this project were compared with those of the previous projects. According to the obtained results, it can be concluded that utilizing PBRM model in this wind turbine project construction, the project duration became 25% shorter than the scheduled duration, and also 29% shorter than average duration of previous similar projects. One of the major problems with projects is that they are not completed according to schedule, and this creates time delays and losses in the implementation of projects. Today, as projects in the energy sector, especially renewable projects, are on the increase, and also we are facing resource constraint in the implementation of projects, using scheduling techniques to minimize delays as well as obtain more realistic project duration is necessary. This research was carried out in a wind farm project. In spite of the initial plan duration of 142 days and average duration of previous similar projects of 146 days, the project was completed in 113 days. This paper introduces a practical project buffer and resource management model for project resource leveling, project buffer sizing and buffer consumption monitoring to reach a more realistic schedule in energy sector. This study adds to the literature by proposing the PBRM model in renewable energy sector.

Keywords: Energy sector; Wind farm project; project buffer and resource management (PBRM) model; Project buffer sizing and buffer consumption monitoring; Resource management.

Publish date: 28 August 2019:

''' A reconfigurable model for implementation in closing phase of a wind turbines project construction '''

Projects are usually delayed in the closure phase, and this delay is transmitted to the whole project. At the closure phase of projects, there is a queue of documents, especially in wind farm projects construction. Also, the relationship among activities is very effective on the completion time of the projects. The overlap among activities causes rework that ultimately leads to an increase in project duration. This will affect the duration of project closure phase too. Also while going through the project closure phase, with regards to the number of servers who do the related activities, a queue of completed turbines’ documents will build, significantly affecting the duration of the stages of the closure phase. To solve the problems above, it is necessary to manage time in the queue, and also to have an exact timeline for completing the closure phase activities. Also, by examining the relationships among activities and reducing rework, can reduce the duration of the activities and in turn, the duration of the closure phase of the project.

This paper introduces a reconfigurable model which is a combination of a schedule model and a queuing system M/M/m/K to reduce the duration of the wind turbine construction project closure phase and reduce the projects’ documentation waiting time in the queue. This research was implemented in a wind farm project. The schedule model deals with reducing the duration of the turbines closure phase by an activities overlapping technique, and the queuing system deals with reducing the turbines’ documentation waiting time in the queue, as well as reducing the probability of servers’ idleness during the closure phase. After the implementation of the model, the obtained results were compared to those of similar previously conducted projects in terms of duration, and the model was found effective. Project closure is an important and mandatory process in all projects. More often than not, this process is faced with problems including prolonged project duration, disputes, lawsuits, and also in projects like the implementation of wind farms, a queue of documents at closing stage, which all may cause difficulties in project closure phase. The contributions of this research are twofold: first, a combination of project management and queuing system is presented, and second, a reconfigurable model is introduced to enhance the performance and productivity of the project’s closure phase through reducing the implementation time and reducing the turbines’ documentation waiting time in the queue, as well as reducing the probability of servers’ idleness during the closure phase of the wind farm project.

Keywords: Project management; Project closing; Queuing system; Activities overlapping; Reconfigurable model; Renewable project.

Buffer
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Perhaps you could move the references to Critical chain project management, then that article could be listed as the 'blue link' on Buffer. Leschnei (talk) 13:48, 19 August 2021 (UTC)