SCHEDULING CONSTRUCTION PROJECT WITH LIMITED AVAILABILITY OF SUBCONTRACTORS

2012 ◽  
Vol 166 (4) ◽  
pp. 96-103
Author(s):  
Sławomir BIRUK
Keyword(s):  
Mathematical Model ◽  
Construction Projects ◽  
Construction Project ◽  
Building Site ◽  
Limited Availability ◽  
Complex Construction ◽  
Project Portfolios ◽  
Selection Of

Complex construction projects involve subcontracting some tasks, as the main contractor is not able to complete them due to resource unavailability, inadequate expertise, or for purely economic reasons. To coordinate operations on the building site, subcontractors availability has to be considered with respect to the project requirements and subcontractors' project portfolios. The paper presents a mathematical model of this problem and an example of its implementation in the selection of subcontractors.

The Research of Collaboration Management Framework for Complex Construction Project

2012 ◽  
Vol 174-177 ◽  
pp. 3360-3363 ◽  
Author(s):  
Zhi Lu Zhen
Keyword(s):  
Construction Projects ◽  
Construction Project ◽  
External Environment ◽  
Risk Prevention ◽  
Collaborative Management ◽  
Prevention Measures ◽  
Management Framework ◽  
Collaboration Management ◽  
Complex Construction ◽  
The Impact

Based on analyzing the complexity of construction projects, we established a collaborative management framework for complex construction project and presented the main content of collaborative management. The main content includes three parts, the first part is the collaborative management for system itself, the second part is to reduce the system complexity in order to reduce the difficulty of management and the last part is to reduce the complexity caused by the uncontrollable external environment. We can use the method of risk pre-assessment and take risk prevention measures to reduce the impact for collaborative management caused by the dynamic external environment.

Modeling of the harmonization method for executing a multi-unit construction project

2019 ◽  
Vol 9 (1) ◽  
pp. 282-291 ◽  
Author(s):  
Michał Tomczak
Keyword(s):  
Construction Industry ◽  
Construction Projects ◽  
Construction Project ◽  
Optimization Method ◽  
Linear Processes ◽  
Project Duration ◽  
Construction Enterprises ◽  
Non Linear ◽  
Implementation Time ◽  
Selection Of

AbstractOne of the key problems in managing the realization of a construction project is the selection of appropriate working crews and coordinating their activities in a way that ensures the highest degree of implementation of defined goals (minimizing the project duration and/or reducing downtime and related costs). Most of the existing methods of work harmonization used in construction industry allow obtaining the desired results only in relation to the organization of the processes realization in repetitive linear projects. In case of realization of non-linear construction objects or construction units, it is usually necessary to choose between the reduction of the project implementation time and maintaining the continuity of crews work on the units. It was found that there is a lack in the literature of developed method enabling harmonization of crews’ work, while minimizing the downtime at work and the duration of the entire project taking into account additional constraints, e.g. the need to not exceed the deadlines for the realization of the project stages.The article presents the concept of a multi-criteria optimization method of harmonizing the execution of non-linear processes of a multi-unit construction project in deterministic conditions. It will enable the reduction of realization time and downtimes in work, taking into account the preferences of the decision maker regarding the relevance of the optimization criteria. A mathematical model for optimizing the selection of crews and order of completion of units in multi-unit construction projects was also developed. In order to present the possibility of usage of the developed concept, an example of the optimal selection of crews and their work schedule was solved and presented. The proposed method may allow for better use of the existing production potential of construction enterprises and ensure synchronization of the crews employed during the work, especially in the case of difficulties in acquiring qualified staff in construction industry.

scholarly journals ALGORITHM FOR PRELIMINARY ASSESSMENT OF THE RELIABILITY OF INVESTMENT PROJECTS IN THE CONSTRUCTION INDUSTRY UNDER UNCERTAINTY

2021 ◽  
pp. 141-148
Author(s):  
O.A. Tuhai ◽  
◽  
T.V. Vlasenko ◽  
Keyword(s):  
Decision Making ◽  
Construction Industry ◽  
Construction Projects ◽  
Construction Project ◽  
Level Of Involvement ◽  
Investment Projects ◽  
The Public ◽  
The Social ◽  
Selection Of ◽  
Theory Of Fuzzy Sets

Abstract. The construction industry is exposed to high risks, which cannot be ignored in case of large investments. The choice of a reliable investment and construction project is important for the success of the investor. A reliable choice of investment and construction project requires taking into account many uncertainties for decision-making. The investor has to be aware of the risks related to the implementation of investment and construction projects, as well as the level of involvement of all the uncertainties in the overall risk of investing in a particular project. These factors may be related to the economic environment, the public policy, mood of the social environment, the market, etc. Accordingly, factor-based decision-making is a vital process that should be considered when alternative investment and construction projects are being assessed. As the construction industry is characterized by long investment cycles, it is a dynamic, complex system with uncertain, incomplete data, as a consequence of a fundamental practical problem when applying investment-selection models construction projects are to determine the distribution of uncertainties to calculate the reliability of the projects. More recently, most approaches to pre-selection investment and construction projects have been presented using linguistic estimates instead of numerical values. This article presents a multi-criteria decision-making methodology for analysis and selection of the most reliable investment and construction project under the conditions of risk and uncertainty. This approach is based on the theory of fuzzy sets, which has the advantage of using linguistic estimates and precise for qualitative and quantitative assessments respectively.

scholarly journals Selection of tachymetry spacing in the process of monitoring of construction projects

2019 ◽  
Vol 97 ◽  
pp. 03027 ◽  
Author(s):  
Oleg Rubtsov ◽  
Ramidin Alisultanov ◽  
Nina Rogova
Keyword(s):  
Construction Projects ◽  
Construction Project ◽  
Research Work ◽  
Deformation Monitoring ◽  
The State ◽  
Structural Elements ◽  
Reflection Mode ◽  
The Subject ◽  
The Cost ◽  
Selection Of

The urbanization of territories and the increase in density of urban development cause the necessity of introduction of improved structural solutions into the construction practice. This is also connected with both the erection of higher buildings with longer span structures and the use of non-standard methods for the analysis of structures. The introduction of modern structural patterns lessens considerably the weight of structures, reduces the consumption of materials and cuts the construction production costs. At the same time, the responsibility for the construction projects enhances. A systematic control over the state of structures including a quasi-continuous one, allows us to reveal the very beginning of destructive processes and to take measures for their liquidation. One of monitoring methods is the tachymetry survey of positions of a number of adjusting marks fixed at the structural elements. The non-reflection mode of operation of tachymetry survey allows lifting the restrictions for the number of points under observations. The combination of the afore-said factors determines the urgency of the use of the tachymetry as a tool for monitoring the state of the construction project. The subject of the study: the subject of the present research work is the methodology of selection of tachymetry spacing during the deformation monitoring of a construction project. The tachymetry can be carried out both in the mode of focusing on pre-established marks, and in the non-reflection mode through the points on the structure. The disadvantage of the first method is the need of installation of light-reflecting marks, which is not always possible due to some technical and/or aesthetic reasons and may lead to a significant increase in the cost of monitoring. The disadvantage of the second method is a reduced accuracy of the measurements. A wide incremental step may lead to the failure of detection of deformation processes, a narrow step means a considerable increase in the monitoring time and an unjustified rise in the cost of monitoring. Objectives: the purpose of this research work is the optimization of tachymetry spacing, which will reveal all deviations of structural elements from their permanent positions by a value exceeding the accuracy of measurements. Materials and methods: the initial material for the study included the results of geodetic observations carried out at various construction projects, in particular, the tachymetry results. The method of study includes the comparing of the limiting admissible curvature value to the minimum deformation value measured with the tachymeter accuracy. Results: a methodology is suggested for the selection of the tachymetry survey step. On its basis, a formula for the determination of a step value is offered that takes into account the geometry of the structure, the strain capacity of the material and the accuracy of the survey. Conclusions: the obtained results allow us to optimize the number of the observation points during the tachymetry survey and to ensure the detection of all destructive effects associated with structural geometry changes at the construction project. The descriptions of the methodology are recommended for their application in the development of geodetic monitoring programmes.

The Research on Selection of Estimate Methods of Artificial Man-Days Unit Price of Power Construction Project

2013 ◽  
Vol 405-408 ◽  
pp. 3437-3441
Author(s):  
Hong Ke ◽  
Chuan Wang ◽  
Gao Feng Luo
Keyword(s):  
Construction Projects ◽  
Cost Management ◽  
Construction Project ◽  
Comprehensive Analysis ◽  
Unit Price ◽  
Power Construction ◽  
Estimate Method ◽  
Application Scope ◽  
Selection Of

The selection of caculation method of the artificial man-days unit price of power construction projects is the focus and hotspot problem of the parties of power construction project and cost management departments. With domestic typical provinces, cities, and industry as the research object, this paper carried out case study and comprehensive analysis of three typical estimate methods of the basic principle, characteristics, application scope etc. The paper gives reference for the selection of estimate method of artificial man-days unit price of power construction project and this research conclusion to estimate method has strong pertinence and guidance.

MULTICRITERIA SELECTION OF PROJECT MANAGERS BY APPLYING GREY CRITERIA / PROJEKTŲ VALDYTOJO PARINKIMO DAUGIATIKSLIO VERTINIMO MODELIS

2008 ◽  
Vol 14 (4) ◽  
pp. 462-477 ◽  
Author(s):  
Edmundas Kazimieras Zavadskas ◽  
Zenonas Turskis ◽  
Jolanta Tamošaitienė
Keyword(s):  
Construction Projects ◽  
Construction Project ◽  
Project Managers ◽  
Project Manager ◽  
Management Personnel ◽  
Grey Relational Grade ◽  
Effective Decision ◽  
Grey Relational ◽  
Selection Of

There is a number of criteria and associated sub‐criteria influencing the match of managers to construction projects. Criteria and sub‐criteria were identified based on a thorough review of the related literature and interviews of management personnel involved in the project managers selection. Project managers characteristics are considered to be less important for an effective project management. The model is based on multicriteria evaluation of project managers. The evaluation embraces the identified criteria influencing the process of construction project manager selection. This paper considers the application of grey relations methodology to defining the utility of alternatives, and offers a multiple criteria method of Complex Proportional Assessment of alternatives with grey relations (COPRAS‐G) for analysis. In this model, the parameters of the alternatives are determined by the grey relational grade and expressed in terms of intervals. A case study presents the selection of construction project manager. The results obtained show that this method may be used as an effective decision aid in multicriteria selection. Santrauka Rodiklių ir susietų subrodiklių skaičius daro poveikį statybos projektų vadovo parinkimui. Išnagrinėjus literatūrą buvo atrinkti pagrindiniai rodikliai, turintys įtaką projektų valdytojo atrankai. Išskirtos svarbiausios projektų valdytojo charakteristikos, gerinančios efektyvų statybos projektų valdymą. Projektų valdytojo modelis pagrįstas daugiatikslio vertinimo metodais. Straipsnyje apžvelgtas intervalais išreikštų sprendinių metodologijos pritaikymas, apibrėžtas alternatyvų naudingumas. Pateiktas daugiatikslio vertinimo kompleksinio proporcingumo įvertinimo metodas naudojant intervalais išreikštus rodiklius intervalais (COPRAS-G). Pateikiamame modelyje alternatyvų parametrai išreikšti intervalais, alternatyvos ranguojamos, nustatomas jų prioritetas. Sprendžiamas uždavinio pavyzdys rodo efektyvų statybos projektų valdytojo parinkimą. Tai iliustruoja gauti rezultatai.

scholarly journals Construction Tender Subcontract Selection using Case-based Reasoning

2012 ◽  
Vol 6 (2) ◽  
pp. 32-43 ◽  
Author(s):  
Due Luu ◽  
Wily Sher
Keyword(s):  
Financial Stability ◽  
Construction Projects ◽  
Construction Project ◽  
Case Based Reasoning ◽  
Past Performance ◽  
Track Record ◽  
Daunting Task ◽  
Competitive Pricing ◽  
Case Based ◽  
Selection Of

Obtaining competitive quotations from suitably qualified subcontractors at tender tim n significantly increase the chance of w1nmng a construction project. Amidst an increasingly growing trend to subcontracting in Australia, selecting appropriate subcontractors for a construction project can be a daunting task requiring the analysis of complex and dynamic criteria such as past performance, suitable experience, track record of competitive pricing, financial stability and so on. Subcontractor selection is plagued with uncertainty and vagueness and these conditions are difficul_t o represent in generalised sets of rules. DeciSIOns pertaining to the selection of subcontr:act?s tender time are usually based on the mtu1t1onand past experience of construction estimators. Case-based reasoning (CBR) may be an appropriate method of addressing the chal_lenges of selecting subcontractors because CBR 1s able to harness the experiential knowledge of practitioners. This paper reviews the practicality and suitability of a CBR approach for subcontractor tender selection through the development of a prototype CBR procurement advisory system. In this system, subcontractor selection cases are represented by a set of attributes elicited from experienced construction estimators. The results indicate that CBR can enhance the appropriateness of the selection of subcontractors for construction projects.

Three-Dimensional Complex Construction Project Management Maturity Model: Case Study of 2010 Shanghai Expo

2012 ◽  
Vol 209-211 ◽  
pp. 1363-1369 ◽  
Author(s):  
Wen Fa Hu ◽  
Da Wei Li ◽  
Rong Hu
Keyword(s):  
Project Management ◽  
Construction Projects ◽  
Construction Project ◽  
Three Dimensional ◽  
Maturity Model ◽  
Construction Project Management ◽  
Model Case ◽  
Project Management Office ◽  
System Maturity ◽  
Complex Construction

The increasing complexity of construction projects as a common trend has had a significant impact on management maturity assessment and improvement for the project participating units, especially for the owners’ Project Management Office (PMO). While most maturity models are rationalistic, this paper presents a practical complex construction project management maturity model based on project management three-dimensional perspective. Integrating Organizational Project Management Maturity Model (OPM3) and Best Practices (BPs) derived from 2010 Shanghai Expo practice, this case-based maturity model is constituted by three sub-models: PBS Maturity, Process Maturity and Organization System Maturity. The model uses structured questionnaire consisting of BPs to implement assessment. The proportion of BPs achieved is considered as the maturity level of assessment objectives. Shanghai Expo AB Area is used to test the validity of the model. The result shows that owners’ PMO can assess and improve their project management maturity with the model effectively.

scholarly journals Allocation and selection of equipment for concrete works using fuzzy linear programming

2021 ◽  
Vol 64 (3) ◽  
pp. 195-199
Author(s):  
Abel Duran ◽  
Nataša Praščević
Keyword(s):  
Mathematical Model ◽  
Linear Programming ◽  
Objective Function ◽  
Construction Projects ◽  
Fuzzy Linear Programming ◽  
Construction Equipment ◽  
Optimal Selection ◽  
Construction Firms ◽  
Timely Completion ◽  
Selection Of

The aim of this research is focused on the problem of allocation and selection of the construction equipment when construction firms bid for construction projects. The main objective of the selection of construction equipment is to ensure the timely completion of all considered projects, while at the same time the planned budget is fulfilled. In this paper fuzzy linear programming is applied with the fuzzy objective function and fuzzy constrains. The proposed mathematical model is applied for optimal selection and allocation of equipment for five projects with different quantities of concrete works and general budget.

scholarly journals Problem minimalizacji przestojów w pracy brygad generalnego wykonawcy w harmonogramowaniu przedsięwzięć budowlanych

2017 ◽  
Vol 26 (2) ◽  
pp. 193-201 ◽  
Author(s):  
Piotr Jaśkowski ◽  
Michał Tomczak
Keyword(s):  
Mathematical Model ◽  
Project Scheduling ◽  
Construction Projects ◽  
Construction Project ◽  
Time Constraints ◽  
Production Capability ◽  
General Contractor ◽  
High Level ◽  
The Mathematical Model ◽  
Construction Project Scheduling

During executing of construction projects enterprises seek for high level of coordinating engaged resources. This seeking evinces in providing continuity and levelling production. It enables making of entire production capability. This paper analyses scheduling work of general contractor crews, which carry out unrhytmic, noncyclic and inhomogeneous processes in deterministic conditions. The mathematical model of work gaps for general contractor crews in construction project scheduling is formulated. This model also counts crews availability limits, cost and time constraints and possibility of tasks outsourcing for subcontractors.

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