scholarly journals Construction Project Planning and Scheduling: A Case of Inlet Separator Fabrication

2021 ◽  
Vol 04 (11) ◽  
Author(s):  
Wiwik Handayani ◽  
Keyword(s):  
Risk Analysis ◽  
Project Scheduling ◽  
Project Planning ◽  
Optimal Time ◽  
Time Duration ◽  
Planning And Scheduling ◽  
Planning Stage ◽  
Scheduling System ◽  
Performance Point ◽  
Automatic Scheduling

Project construction activities must be analyzed from the planning stage to the execution stage so that they can be achieved optimally and achieve the best performance point. Project planning relies on a project scheduling system, of course requiring updates and modifications that show the project conditions in real time. The aims of this paper is propose a project scheduling system that can accommodate projects that have large-scale activities by proposing scheduling and risk analysis using Primavera P6 and Primavera risk analysis. A case study was conducted on the construction of an inlet separator fabrication project in Batam, Indonesia. The proposed method aims to calculate the optimal project completion time through automatic scheduling with primavera software. The method demonstrates practical value for project managers in identifying the shortest project duration and estimating the most optimal time duration for carrying out activities. In addition, using automatic scheduling can provide more complex information including successors and predecessors of activities, critical times, estimates of the overall duration of the project.

scholarly journals Rescheduling Proyek Pembangunan Jembatan Palu V Menggunakan Microsoft Project

2021 ◽  
pp. 53-58
Author(s):  
Aslam Aslam ◽  
T.M. Kamaludin
Keyword(s):  
Project Scheduling ◽  
Secondary Data ◽  
Project Planning ◽  
Project Work ◽  
Time Duration ◽  
Planning Time ◽  
Work Activity ◽  
Project Completion ◽  
Time Estimates ◽  
Relationship Of

One form of project planning is Project scheduling. Project scheduling is one of the elements of Project planning results, which can provide information on the relationship of each other activity to the entire project, the identification of relationships that must be precedence between activities, showing realistic cost and time estimates for each activity on project completion. In this research the author plans to process project work activity of the Palu V Bridge development by limiting its job stage to the quality of concrete work of FC ' 30MPa for the building over the floor plate. This type of research is analytic. Data collection in the form of secondary data such as schedule and RAB is done by requesting directly the required data to the relevant party. Then conducted initial schedule evaluation, followed by using Microsoft Project 2019 tool as processing result of the project Process Bridge Hammer V. From the results of the study it was concluded that process use Microsoft Project 2019 requiring a duration of 199 working days. While the scheduling is carried out in the field, the executor requires a duration of 366 working days and the planned scheduling of the implementing party takes 167 working days. If compared to the results of scheduling time duration with the implementation of the field and the duration of the execution planner, the results obtained by the researcher more than 167 days from the time of implementation in the field and slower 32 days from the duration of the planning time.

Using PERT to Optimise the Completion Time of Air-Conditioning and Mechanical Ventilation (ACMV) Project

2019 ◽  
Vol 892 ◽  
pp. 266-273
Author(s):  
Chuan Kian Pang ◽  
Noor Ajian Mohd-Lair ◽  
Yi Sheng Chua
Keyword(s):  
Mechanical Ventilation ◽  
Air Conditioning ◽  
Completion Time ◽  
Critical Path ◽  
Project Planning ◽  
Optimal Time ◽  
Planning And Scheduling ◽  
Project Completion ◽  
High Penalty ◽  
Completion Times

An air-conditioning and mechanical ventilation (ACMV) construction project involved many interrelated construction activities with varying durations and multiple dependencies. This paper focuses on the development of a best possible project planning and scheduling technique that can help the project manager to manage and complete the ACMV project in optimal time. The program evaluation and review technique (PERT) is used in this research. The PERT technique helps to determine the probabilities of various stages of the project by specified deadlines and identify the activities on the critical path that have high potential for causing delays in the project completion time. The completion times of 72, 76, 79, and 80 weeks were taken for the PERT analysis. Deadline of 72 weeks is the contractual period of the ACMV project as specified in the contract. Completion time of 76 weeks is the critical path of the project as analyzed by the PERT technique. The deadline of 79 weeks is the proposed completion time for the ACMV project whereas 80 weeks are the actual completion date of the project. The PERT analysis revealed that the project completion time of 72 weeks, which is as stated in the contractual completion time, yielded the probability of completion of 2.67% only. This analysis shows that the contractual period is impossible to be achieved and it is an unrealistic time setting. Further negotiation is required including changing or extending of the contractual completion time. The other completion times are able to be achieved but the company may need to face the high penalty costs due to the delays in completion time.

scholarly journals Research on Collaborative Planning and Symmetric Scheduling for Parallel Shipbuilding Projects in the Open Distributed Manufacturing Environment

Symmetry ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 161
Author(s):  
Xuezhang Mao ◽  
Jinghua Li ◽  
Hui Guo ◽  
Xiaoyuan Wu
Keyword(s):  
Decision Making ◽  
Project Scheduling ◽  
Collaborative Planning ◽  
Project Planning ◽  
Decision Making Process ◽  
Distributed Manufacturing ◽  
Manufacturing Environment ◽  
Distributed Resources ◽  
Planning And Scheduling ◽  
Shipbuilding Industry

In the current distributed manufacturing environment, more extensive enterprise cooperation is an effective means for shipbuilding companies to increase the competitiveness. However, considering the project scale and the uneven production capacity between the collaborative enterprises, a key issue for shipbuilding companies is to effectively combine the product-oriented project tasks and the specialized production-oriented plants. Due to information privatization, the decision-making process of project planning and scheduling is distributed and symmetric. Existing project scheduling methods and collaboration mechanisms in the shipbuilding industry are somehow inefficient. The aim of the research is to provide an assistant decision-making method to support effective task dispatching and multi-party cooperation for better utilization of the distributed resources and to help project managers control the shipbuilding process. The article initially establishes an agent-based complex shipbuilding project collaborative planning and symmetric scheduling framework, simulating the distributed collaborative decision-making process and bridging the multi-project planning with the individual project scheduling in much detail, which fills the research gap. A negotiation method based on iterative combination auction (ICA) is further proposed to solve the integration problem of project planning and task scheduling, and an illustrative example is conducted to demonstrate the effectiveness and rationality of the methods. Finally, an application case using a prototype system on shipbuilding projects collaborative planning and scheduling will be reported as a result.

scholarly journals SIMULATION MODELLING CONSTRUCTION PROJECT WITH REPETITIVE TASKS USING PETRI NETS THEORY

2008 ◽  
Vol 9 (3) ◽  
pp. 219-226 ◽  
Author(s):  
Sławomir Biruk ◽  
Piotr Jaśkowski
Keyword(s):  
Petri Nets ◽  
Construction Project ◽  
Production Capacity ◽  
Simulation Modelling ◽  
Project Planning ◽  
Computational Method ◽  
Simulation Research ◽  
Planning And Scheduling ◽  
Planning Stage ◽  
Construction Companies

Resources selection and allocation at the project planning stage is an important issue for reducing project cost, duration and risk. Existing planning and scheduling methods overlook aspects of limited production capacity of construction companies (contractors) due to the fact that they are simultaneously engaged in realization of some projects. This paper presents a new methodology for project scheduling with repetitive processes using Petri nets based approach. The paper starts with an overview of current developments in the Petri nets theory. We then propose an efficient computational method based on simulation of Petri net model for construction project planning and subcontractor agreement analysis. An example of construction project simulation research is presented to illustrate the method of project planning and resources allocation.

scholarly journals Corruption Risk Analysis at the Project Planning Stage in the Iraqi Construction Sector using the Bowtie Methodology

2021 ◽  
Vol 11 (3) ◽  
pp. 7223-7227
Author(s):  
S. H. N. Alani ◽  
A. M. R. Mahjoob
Keyword(s):  
Economic Development ◽  
Risk Analysis ◽  
Multidisciplinary Team ◽  
Project Planning ◽  
Construction Sector ◽  
Planning Stage ◽  
Widespread Phenomenon ◽  
Proactive Measures ◽  
Score Risk

In this paper, the bowtie method was utilized by a multidisciplinary team in the Federal Board of Supreme Audit (FBSA)for the purpose of managing corruption risks threatening the Iraqi construction sector. Corruption in Iraq is a widespread phenomenon that threatens to degrade society and halt the wheel of economic development, so it must be reduced through appropriate strategies. A total of eleven corruption risks have been identified by the involved parties in corruption and were analyzed by using probability and impact matrix and their priority has been ranked. Bowtie analysis was conducted on four factors with high score risk in causing corruption in the planning stage. The number and effectiveness of the existing proactive measures to prevent threats from resulting in corruption and were examined for each threat.

scholarly journals Integrating Schedule Risk Analysis with Multi-Skilled Resource Scheduling to Improve Resource-Constrained Project Scheduling Problems

2021 ◽  
Vol 11 (2) ◽  
pp. 650
Author(s):  
Muritala Adebayo Isah ◽  
Byung-Soo Kim
Keyword(s):  
Risk Analysis ◽  
Project Scheduling ◽  
Resource Scheduling ◽  
Scheduling Problems ◽  
Project Schedule ◽  
Risk And Uncertainty ◽  
Resource Constrained ◽  
Resource Constrained Project Scheduling ◽  
Schedule Risk ◽  
Schedule Risk Analysis

Construction projects are planned in a complex and dynamic environment characterized by high risks and uncertainties amidst resource constraints. Assessing construction schedule risk facilitates informed decision-making, especially in a resource-constrained situation, and allows proactive actions to be taken so that project objectives are not jeopardized. This study presents a stochastic multiskilled resource scheduling (SMSRS) model for resource-constrained project scheduling problems (RCSPSP) considering the impact of risk and uncertainty on activity durations. The SMSRS model was developed by integrating a schedule risk analysis (SRA) model (developed in MS Excel) with an existing multiskilled resource scheduling (MSRS) algorithm for the development of a feasible and realistic schedule. The computational experiment carried out on three case projects using the proposed SMSRS model revealed an average percentage deviation of 10.50%, indicating the inherent risk and uncertainty in activity durations of the project schedule. The core contribution of the proposed SMSRS model is that it: (1) presents project practitioners with a simple tool for assessing the risks and uncertainty associated with resource-constrained project schedules so that necessary response actions can be taken to ensure project success; (2) provides the small-scale construction businesses with an affordable tool for evaluating schedule risk and developing a feasible and realistic project schedule.

Repowering and Retrofitting

2002 ◽  
Author(s):  
Andreas Pickard
Keyword(s):  
Steam Turbine ◽  
Power Plants ◽  
Free Market ◽  
Leading Edge ◽  
Project Planning ◽  
Combined Cycle ◽  
Steam Turbines ◽  
Planning Stage ◽  
Reheat Steam ◽  
Plant Optimization

At the start of this new century, environmental regulations and free-market economics are becoming the key drivers for the electricity generating industry. Advances in Gas Turbine (GT) technology, allied with integration and refinement of Heat Recovery Steam Generators (HRSG) and Steam Turbine (ST) plant, have made Combined Cycle installations the most efficient of the new power station types. This potential can also be realized, to equal effect, by adding GT’s and HRSG’s to existing conventional steam power plants in a so-called ‘repowering’ process. This paper presents the economical and environmental considerations of retrofitting the steam turbine within repowering schemes. Changing the thermal cycle parameters of the plant, for example by deletion of the feed heating steambleeds or by modified live and reheat steam conditions to suit the combined cycle process, can result in off-design operation of the existing steam turbine. Retrofitting the steam turbine to match the combined cycle unit can significantly increase the overall cycle efficiency compared to repowering without the ST upgrade. The paper illustrates that repowering, including ST retrofitting, when considered as a whole at the project planning stage, has the potential for greater gain by allowing proper plant optimization. Much of the repowering in the past has been carried out without due regard to the benefits of re-matching the steam turbine. Retrospective ST upgrade of such cases can still give benefit to the plant owner, especially when it is realized that most repowering to date has retained an unmodified steam turbine (that first went into operation some decades before). The old equipment will have suffered deterioration due to aging and the steam path will be to an archaic design of poor efficiency. Retrofitting older generation plant with modern leading-edge steam-path technology has the potential for realizing those substantial advances made over the last 20 to 30 years. Some examples, given in the paper, of successfully retrofitted steam turbines applied in repowered plants will show, by specific solution, the optimization of the economics and benefit to the environment of the converted plant as a whole.

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