浅谈项目管理中的成本管理

随着经济的不断发展,我国为了扩大内需抓紧各项基础设施的建设,近年来,特别是高速公路发展得尤为快速。项目中标后,进入前期规划和中期实施阶段中,成本管理水平参差不齐以及施工过程中待解决的问题和矛盾众多,往往导致项目管理重进度、质量、安全而忽略效益。成本居高不下,经济效益很难达到预期效果。文章就是对上述问题进行探讨,并提出有...     

Leadership for future construction industry: Agenda for authentic leadership

Research in the construction industry is beginning to pay more attention to project leadership. Current perception of construction project leaders is largely built around power, authority, and task-orientation. This is due to the traditional focus of the construction industry on technical and managerial features of construction projects. However, greater challenges of modern times and increasingly different business environment necessitate a renewed vision for leadership research and call for a change in traditional perception and mindset about leadership in the construction industry. Globalization and fast changing nature of construction have necessitated a need for project managers to have and apply different leadership behaviors, competencies and styles. To highlight the need for a new breed of construction project leaders, this paper discusses the recent construct of “authentic leadership” in the context of construction projects. Authentic project leaders possess positive values, lead from the heart, set highest levels of ethics and morality, and go beyond their personal interests for well-being of their followers. They capitalize on the environment of trust and are able to motivate people and accomplish challenging tasks. Authentic leadership possesses high potential for development as well as veritable performance of construction project leaders. Proposal made in this paper highlights benefits of authentic leadership development in construction professionals and discusses the relevant practical and research implications. An agenda for research on authentic leadership in the construction industry is also discussed in detail.     

钢铁企业建设项目工程造价的控制

工程造价控制是一项系统工程,贯穿于项目建设的全过程。本文针对钢铁企业建设单位在工程建设中存在工程造价失控的一些原因,提出了一些有效的控制方法,减少或避免建设资金的浪费,最大限度地提高投资效益。     

建设工程项目造价管理

建设工程项目造价管理是工程建设过程中的重要部分,造价管理必须贯穿项目各阶段,包括决策设计阶段、项目实施阶段、竣工验收阶段。良好的造价管理可以节约成本、提升利润和缩短工期。文章就工程造价控制的意义和相关措施进行具体分析论述。     

Global virtual engineering teams (GVETs): A fertile ground for research in Australian construction projects context

Implementation of global virtual engineering teams (GVETs) commenced since at least two decades ago, but construction has been behind other industries in terms of harnessing this new paradigm. Nevertheless, GVETs are receiving increasing attention within the construction context due to numerous potential benefits they can bring about for the projects. On the other hand, the research about GVETs in Australia is still in its embryonic stages. Australian scholars noticeably have paid scant attention to GVETs in comparison to their colleagues in other developed countries. This paper assumes the process of implementation of a GVET as an isolated project. The study then highlights the well-known main areas of necessary knowledge for managing a GVET project within the construction context based on a project lifecycle approach. Recognizing the weaknesses of existing literature, the paper sets out an agenda for further research within Australian construction projects.     

Contractors' perception of the use of costs of quality system in Malaysian building construction projects

While conforming on the findings of prior researches regarding quality cost system in building companies, current research successfully illustrates the contractors' perceptions on the importance of the quality cost system and the barriers that may constrain the implementation of the system for recording and collecting quality cost data. A postal and email surveys were undertaken on Malaysian building companies, focusing on the benefits and difficulties associated with the implementation of quality cost system. Statistical analyses based on Chi-Squared test and Relative Importance Index techniques were used to investigate the significance of the findings and determine the relative importance of the factors. The most important benefit of measuring quality costs is “getting management attention and increase quality awareness” as perceived by the sample of the study. The possible barriers that may affect the management's decision to implement quality cost system are identified and grouped into three categories, which are culture and knowledge; system; and company. The study suggests that the level of the site staff's knowledge should be as important as that of the management to successfully collect and record quality costs data. The findings of this research will raise the level of awareness and sensitize managers and those involved with building industry about the importance of quality cost system and collecting quality costs data.     

Constructability implementation: a survey in the Malaysian construction industry

Twenty-three constructability concepts are identified. Based on these, an industry-wide questionnaire was administrated in Peninsular Malaysia. The respondents were the engineers working with owners, consultants, contractors, subcontractors and construction management firms. The importance, from the viewpoint of the Malaysian engineers, of the constructability concepts and the degree of the actual application of those concepts in the Malaysian Construction Industry is presented so that an insight on constructability implementation can be established. Fieldwork results revealed that the Malaysian engineers showed high acceptance of 22 concepts and rejected the one that relates to the fast-track method of construction. Those engineers accepted the constructability concepts from the theoretical point of view but generally they did not apply these concepts in their practices. The study also concludes that the Malaysian engineers show a wide understanding of the majority of the concepts. However, they did not link those concepts under the umbrella of constructability.     

Crisis management in Turkish construction industry

Various economical crises have affected Turkish economy during the last decade and construction industry has always been among the hardest hit; giving the idea that a comprehensive approach to crisis management is unavoidable. However, literature showed no findings related with crisis management applications by construction companies. Thus, a questionnaire survey was undertaken by the top management of 120 construction companies to investigate the degree of crisis management applications throughout the industry, mainly focusing on the outcomes during the economical crisis in 2001. Frequency analysis, Likert scale of comparison, Thurstone's paired comparisons, Pearson's chi-square test and Fisher's exact test were used to evaluate the results.     

The view of freedom and standardisation among managers in Swedish construction contractor projects

It has been suggested that standardisation improves productivity. Simultaneously, construction contractor project managers are given freedom to run projects as if they were independent firms. If this is a motivating factor for the managers, firms may have to find other ways to improve productivity than to increase standardisation to be able to stimulate their most skilled managers. It could prove important to recognise their need for freedom before they start looking for alternative places of employment.     

Predicting final cost for competitively bid construction projects using regression models

This paper studies the relationship between the low bid and completed cost for competitively bid highway projects. Data are analyzed from several agencies managing highway and dredging projects. A natural log transformation of the low bid and final cost was found to produce regression models for each agency that had high R and R² values. These models can predict completed project cost using only the project low bid as input. A separate regression model was determined for each agency. Based on the form of the calculated models it appears that highway agencies construct projects where the final cost increases as an increasing percentage of the low bid price as the project magnitude increases. The dredging projects appear to follow different mechanisms of cost increase than the highway projects and were not predicted as well by the regression models. The regression models can also be used for budgeting purposes by submitting the sum of the low bids for a group of projects as input. The regression models output a prediction of the cost of the group of projects that was found to be highly accurate.     

房地产开发项目施工阶段的成本控制

房地产开发项目施工阶段的成本控制是项目成本全过程控制中极其重要的一个环节和阶段,它与设计阶段的成本控制一起构成房地产开发项目成本控制的两个关键阶段。本文针对施工阶段成本控制的重点内容及控制方法进行探讨及分析。     

A contingency estimation model for software projects

A contingency estimation model for software development projects is presented. The proposed model considers the estimated cost and the risk of software projects to estimate contingency resources; hence, contingency estimates are correlated to the cost and risk of software projects. The model uses a generic probabilistic representation of the estimated cost; hence, it can be deployed with any project development environment and provides a flexible choice to software managers. Furthermore, the proposed model considers the risk tolerance of software organizations to estimate the contingency and helps to abate the maximum impacts of risk events within the risk tolerance. The proposed model is scalable to a portfolio of software projects. The model produces sub-additive contingency estimates which is essential to optimize a software project or a portfolio of software projects. The results of a case-study show that the contingency estimates are comparable with the actual contingency resources needed for the development of real software development projects.     

Current condition and future directions for lean construction in highways projects: A small and medium-sized enterprises (SMEs) perspective

The aim of this study is to identify the parameters defining how Lean Construction (LC) is being implemented (current condition) and how LC can be further promoted (future direction) from a Small-Medium Sized Enterprises (SMEs) perspective. Although SMEs constitute the largest group in construction supply chains, LC, as an emerging phenomenon in civil construction project management, has been rarely investigated from an SMEs perspective. Also, overlooking the more macro factors like project governance and supply chain management, LC deployments have been mainly discussed from a production process perspective to date. After a review of the extant literature and 20 interviews with managers from the highways sector, a list of 31 current condition and 40 future direction statements were produced, classified under the delivery, process, training, project governance and supply chain related headings and used in a questionnaire survey with 110 responses. The current condition highlights problems like a short-term relations structure, competitive tendering mechanisms, fragmentation, problems in engaging with SMEs for LC, unstandardised LC techniques, and issues with convincing SMEs to deploy LC by demonstrating the business case on mutual benefits. Action items relating to the current project delivery structure were given the highest importance by the supply chain, alongside the LC training and project governance issues for the future of LC at highways SMEs. Additionally, a statistically significant correlation was identified among many future action items.     

工程项目施工规划与造价管理分析

本文通过工程项目施工规划的分析,提出在施工规划时考虑合理有效措施加强造价管理的理念,以达到事前控制造价的目的,强调运用这种理念对工程项目降低施工成本,控制工程造价的重要意义。     

Modeling construction time in Spanish building projects

The literature states that project duration is affected by various scope factors. Using 168 building projects carried out in Spain, this paper uses the multiple regression analysis to develop a forecast model that allows estimating project duration of new builds. The proposed model uses project type, gross floor area (GFA), the cost/GFA relationship and number of floors as predictor variables. The research identified the logarithmic form of construction speed as the most appropriate response variable. GFA has greater influence than cost on project duration but both factors are necessary to achieve a forecast model with the highest accuracy. We developed an analysis to verify the stability of forecasted values and showed how a model with high values of fit and accuracy may display an anomalous behavior in the forecasted values. The sensitivity of the proposed forecast model was also analyzed versus the variability of construction costs.     

Delays in construction projects: The case of Jordan

The construction industry is a major player in the economy, generating both, employment and wealth. However many projects experience extensive delays and thereby exceed initial time and cost estimates. A host of causes of construction delays in residential projects were identified and classified according to Drewin’s Open Conversion System. The most common causes were evaluated by using both, the data collected in a survey conducted to residential projects consultant engineers, contractors, and owners, and interviews with senior professionals in the field. Most correspondents agreed that, financial difficulties faced by the contractor and too many change orders by the owner are the leading causes of construction delay. Severe weather conditions and changes in government regulations and laws ranked among the least important causes.     

建设工程成本管理的标准化建设

文章分析了目前我国建筑企业施工项目成本管理状况,提出了成本标准的概念,阐述了成本标准在实践中的具体运用,给出了建筑企业施工项目成本标准化管理的程序。     

对某项目实施阶段工程管理中造价控制的一些体会

介绍造价工程师在某项目的工程招标、工程施工及工程竣工决算3个阶段,如何科学地运用专业技术知识,客现、合理、有效地控制工程造价.