Flow-down of safety from general contractors to subcontractors working on commercial construction projects

2021 ◽  
Vol 142 ◽  
pp. 105353
Author(s):  
Ann Marie Dale ◽  
Marco Barrera ◽  
Ryan Colvin ◽  
Jaime Strickland ◽  
Bradley A. Evanoff
Keyword(s):  
Construction Projects ◽  
General Contractors

A Knowledge Management Portal System for Construction Projects Using Knowledge Map

2011 ◽  
pp. 299-322 ◽  
Author(s):  
H. Ping J. Tserng ◽  
Yu-Cheng (V.) Lin
Keyword(s):  
Knowledge Management ◽  
Construction Projects ◽  
Explicit Knowledge ◽  
Portal System ◽  
Knowledge Map ◽  
Knowledge Maps ◽  
General Contractors ◽  
Management Concept ◽  
Core Project ◽  
Map Search

Knowledge management (KM) has become an important term in the construction industry. Knowledge management involves creating, securing, capturing, coordinating, combining, retrieving, and distributing knowledge. Most know-what, know-how, and experience exists only in the minds of individual participants during the construction phase of construction projects. The knowledge can be reused and shared among the involved engineers and experts to improve the construction process and reduce the time and cost of solving problems. Sharing and reusing knowledge depends on acquiring and preserving of both tacit knowledge and explicit knowledge as the property of a corporation. This study addresses application of knowledge management in the construction phase of construction projects and proposes a construction activity-based knowledge management (ABKM) concept and system for general contractors. This chapter proposes a practical methodology to capture and represent construction project knowledge by using knowledge maps. Using knowledge maps, users can get an overview of available and missing knowledge in core project areas and take appropriate management in tacit and explicit knowledge. Also, a Web-based system is developed to assist and present project-related knowledge by providing keyword and map search on the Internet environment. The ABKM system is then applied in a case study of a construction precast building project in Taiwan to verify our proposed methodology and demonstrate the effectiveness of sharing knowledge special in the construction phase. By effectively using information and Web technologies during the construction phase of a project, knowledge can be captured and managed to benefit future projects. The combined results demonstrate that an ABKM-like system can be an effective tool for all experts and engineers participating in construction projects by utilising the knowledge management concept and Web technology.

scholarly journals Initial Analysis, Planning and Calculation of Vertical Delivery in High-rise Building Construction

2017 ◽  
Vol 48 (2) ◽  
pp. 87-92 ◽  
Author(s):  
Simo Suđić
Keyword(s):  
Construction Projects ◽  
Critical Path ◽  
Vital Role ◽  
Optimal Number ◽  
Building Site ◽  
Tower Crane ◽  
Concrete Production ◽  
General Contractors ◽  
Time Calculation ◽  
Major Factors

Tower crane plays a vital role in materials delivery in construction projects. General contractors often use technical and commercial quotes to calculate number of cranes and their engagement duration in project, and they often have to deal with commercial and time risks. The main reason for this approach is the lack of standardised methodologies for calculating tower cranes engagement. Identifying the optimal number of cranes, their location and duration of engagement at the building site are the major factors that can reduce the risks considering the time and cost by increasing productivity and thus decreasing the required time. Calculation will be based on different production parameters -space per worker, concrete production per crane or worker, lifting time. This paper presents a methodology for calculating the required number of cranes and their optimal positioning. Proposed model for crane engagement optimisation is developed using the Critical Path Method in Primavera P6 software.

Determining Contingencies in the Management of Construction Projects

2019 ◽  
Vol 50 (2) ◽  
pp. 226-242 ◽  
Author(s):  
José I. Ortiz ◽  
Eugenio Pellicer ◽  
Keith R. Molenaar
Keyword(s):  
Project Management ◽  
External Validity ◽  
Construction Projects ◽  
Construction Project ◽  
Construction Project Management ◽  
Depth Analysis ◽  
Different Types ◽  
General Contractors ◽  
Project Objectives

This research describes the managerial approaches that contractors follow to determine different types of contingencies in construction project management. Two large Spanish general contractors were selected for an in-depth analysis. Interviews and surveys were conducted with six additional companies to explore the external validity of the findings. Managers constrain time and cost buffers through project objectives, applying heuristics to determine inventory buffers. The management of capacity buffers is entrusted to subcontractors. The contractors take advantage of scope and quality buffers to meet project objectives but rarely share these buffers with the owner, unless the owner is an internal client.

scholarly journals Development of a cost controlling system for an investment and construction project

2021 ◽  
Vol 263 ◽  
pp. 05048
Author(s):  
Maria Bovsunovskaya
Keyword(s):  
Construction Projects ◽  
Building Materials ◽  
Construction Project ◽  
Banking System ◽  
Cost Controlling ◽  
Controlling System ◽  
General Contractors ◽  
The Russian Federation ◽  
The Cost ◽  
Cost Of Construction

The study is devoted to substantiating the need to develop a cost controlling system in order to improve the efficiency of investors, developers, customers, general contractors, as well as representatives of the banking system who are directly involved in the implementation of investment and construction projects. The paper summarizes the innovations of the Ministry of Construction, Housing and Utilities of the Russian Federation in the field of determining the cost of construction at the stages of the life cycle of an investment and construction project, and suggests their adaptation to the activities of commercial customers. The factors of the rise in the cost of construction in the modern conditions of the investment and construction sphere are systematized, including topical issues of the rise in cost due to the increase in prices of building materials. The main risks arising from the implementation of the project associated with an increase in cost are highlighted. As the results of the study, stages of construction cost control with a description of their content and a system of cost controlling of an investment and construction project are proposed.

scholarly journals Prediction of Cost Overrun Risk in Construction Projects

2020 ◽  
Vol 12 (22) ◽  
pp. 9341
Author(s):  
Edyta Plebankiewicz ◽  
Damian Wieczorek
Keyword(s):  
Prediction Model ◽  
Construction Projects ◽  
Fuzzy Inference ◽  
Unit Price ◽  
Design Stage ◽  
Rule Base ◽  
Cost Overrun ◽  
Single Output ◽  
General Contractors ◽  
Input Variables

The paper proposes a cost overrun risks prediction model, the structure of which is based on the fuzzy inference model of Mamdani. The model consists of numerous inputs and one output (MISO, multi-input-single-output), based on processes running consecutively in three blocks (the fuzzy block, the interference block, and the block of sharpening the representative output value). The input variables of the model include the share of element costs in the building costs (SE), predicted changes in the number of works (WC), and expected changes in the unit price (PC). The developed rule base makes it possible to determine the risk of cost overruns in the following categories: “very low”, “quite low”, “average”, “quite high”, and “very high”. Twenty-seven rules were assumed in the interference block. The operation of the model was illustrated by the example of selected elements of a road object and was validated by checking the correctness of the assumptions made at the design stage of the inference block rule base. It has been proven that with the increase of the share of element costs in the building costs (SE), predicted changes in the number of works (WC), and expected changes in the unit price (PC), the value of the risk exceeding the costs of a given element of the construction project (R) increases naturally and smoothly. It was emphasized in the conclusions that the cost overrun risks prediction model is intended for general contractors who subcontract many stages of works to their subcontractors in accordance with the agreed division into work elements.

A Knowledge Management Portal System for Construction Projects Using Knowledge Map

2011 ◽  
pp. 692-710
Author(s):  
H. Ping ("Jack") Tseng ◽  
Yu-Cheng ("Vincent") Lin
Keyword(s):  
Knowledge Management ◽  
Construction Projects ◽  
Explicit Knowledge ◽  
Portal System ◽  
Knowledge Map ◽  
Knowledge Maps ◽  
General Contractors ◽  
Management Concept ◽  
Core Project ◽  
Map Search

Knowledge management (KM) has become an important term in the construction industry. Knowledge management involves creating, securing, capturing, coordinating, combining, retrieving, and distributing knowledge. Most know-what, know-how, and experience exists only in the minds of individual participants during the construction phase of construction projects. The knowledge can be reused and shared among the involved engineers and experts to improve the construction process and reduce the time and cost of solving problems. Sharing and reusing knowledge depends on acquiring and preserving of both tacit knowledge and explicit knowledge as the property of a corporation. This study addresses application of knowledge management in the construction phase of construction projects and proposes a construction activity-based knowledge management (ABKM) concept and system for general contractors. This chapter proposes a practical methodology to capture and represent construction project knowledge by using knowledge maps. Using knowledge maps, users can get an overview of available and missing knowledge in core project areas and take appropriate management in tacit and explicit knowledge. Also, a Web-based system is developed to assist and present project-related knowledge by providing keyword and map search on the Internet environment. The ABKM system is then applied in a case study of a construction precast building project in Taiwan to verify our proposed methodology and demonstrate the effectiveness of sharing knowledge special in the construction phase. By effectively using information and Web technologies during the construction phase of a project, knowledge can be captured and managed to benefit future projects. The combined results demonstrate that an ABKM-like system can be an effective tool for all experts and engineers participating in construction projects by utilising the knowledge management concept and Web technology.

scholarly journals Developing a Risk Management Process for General Contractors in the Bidding Stage for Design–Build Projects in Vietnam

Buildings ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 542
Author(s):  
Duy-Hoang Pham ◽  
Dang-Huy Ly ◽  
Ngoc-Khue Tran ◽  
Yong-Han Ahn ◽  
Hyeongjae Jang
Keyword(s):  
Risk Management ◽  
Construction Projects ◽  
Local Level ◽  
Management Process ◽  
Management Objectives ◽  
Risk Management Process ◽  
Design Build ◽  
General Contractors ◽  
Bid Prices ◽  
The Cost

Design–build (DB) projects have become increasingly popular for construction projects in developing countries due to the cost and scheduling advantages and their design optimization ability. As a result, much research has been conducted on improving DB efficiency in terms of cost, scheduling, risk management, etc. However, the existing studies have mainly focused on the owner’s roles, whereas general contractors (GCs) must also take many risks on behalf of owners in DB projects. The adequate identification and assessment of risks before engaging a contractor can increase the likelihood of a project’s success, at least from a DB contractor’s perspective. Therefore, this study interviewed procurement experts to conduct a survey at the local level, then analyzed, developed, and proposed an additional risk management process (RMP) for use by GCs during the bidding process of DB projects. A case study was conducted with a large Vietnamese GC to evaluate the effectiveness of the process and find ways to optimize it in the future. The results of the study showed that risk management during a DB project is imperative. Nevertheless, preparing bids is time-consuming and increases the contingency costs, reducing the competitiveness of the bid prices for contractors. Therefore, depending on the specific project and risk management objectives, an RMP is recommended for adjusting the risk management target to reduce the risk, while still maintaining the competitiveness of the bid prices.

Risk management in residential projects in the United States: Implementation status, evaluation techniques and barriers

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Simon Adamtey ◽  
James Ogechi Kereri
Keyword(s):  
Risk Management ◽  
Empirical Evidence ◽  
Construction Projects ◽  
Multinomial Logistic Regression ◽  
The United States ◽  
The Body ◽  
Content Type ◽  
General Contractors ◽  
The Impact ◽  
Residential Projects

Purpose Residential projects frequently suffer from low-risk management (RM) implementation and, consequently, are more likely to fail to meet performance objectives. With RM becoming an essential requirement, the purpose of this study is to investigate RM implementation in terms of status, risk analysis techniques, barriers and impact of RM on residential projects across the USA. Design/methodology/approach Data were collected from 105 general contractors who had completed 3,265 residential projects in the past five years. Data collection was through a US national survey sent out through emails between August and November 2019 to residential general contractor firms. The firms were randomly selected from national organizations, such as the National Association of Home Builders, Associated General Contractors of America and Associated Builders and Contractors. Findings The analysis indicated that RM implementation is still extremely low at 22.27%. However, there was an increase in RM implementation as the cost and duration of projects increased. Direct judgment is the most used technique. Also, the one-sample t-test indicated that the barriers have a significant impact on RM implementation. Multinomial logistic regression results indicated that the impact of lack of management support, lack of money or budget, the complexity of analytical tools and lack of time to perform analysis predict the impact on the overall performance of construction projects. Overall, the results provide empirical evidence, which can influence management’s decision-making regarding RM and improve implementation in residential projects. Originality/value There is a lack of empirical evidence on the impact of barriers to RM implementation on the performance of construction projects. This research contributes to the body of knowledge by bridging this gap through a robust analysis of data collected from real residential projects.

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