1,721,034 research outputs found
Optimization numbers of labors composition calculation based on probabilistic condition
No full textEstimating a construction project usually based on activity unit price analysis that\ud
consists of materials, manpower and machines. Unit price analysis gives an effective tool for construction management purpose. This effectiveness depends on how accurate the calculation of each variable in the unit price analysis. In a developed country, where standardization is a common condition, the accuracy gives less deviation than in an uncertain condition. The uncertainty occurs due to lack of effective standardizations, which usually happens in a developing country. It gives difficulty in construction project estimating calculation. Based on this problem, a study is attempted to propose a solving technique by using a linear programming method for number of labor composition\ud
optimization. The approach considers uncertainty condition of manpower’s productivity that gives a probabilistic characteristic. By doing so, it could be used to increase competitiveness capabilities and labor selection process
Corrective action recommendation for project cost variance in construction material management
No full textIn construction project operation, often there is a project cost variance in terms of the\ud
material, equipments, manpower, subcontractor, overhead cost, and general condition. Material is the main component in construction projects. Therefore, if the material management is not properly managed it will create a project cost variance. Project cost can be controlled by taking corrective actions towards the cost variance. The objective of this research paper is to identify the main cause of the cost variance and to recommend the corrective actions. The approach to serve that objective is by conducting surveys to high rise building construction projects in order to identify the cause of project cost variance in material purchasing, and by interviewing experts in order to obtain recommendations in taking corrective actions. Method Analysis used in this research is Delphi method. The result of the research shows that the corrective action towards the variance of the material purchasing cost is actually a preventive action (before process
Non-productive activity time measurement as a base for construction workers productivity improvement
No full textA practical system for measuring worker productivity is an essential prerequisite for the\ud
design of national and regional construction labor productivity improvement programs in Indonesia. It is important, because labor not only constitutes a large part of construction cost, but also susceptible to the influence of construction management. Indonesian construction industry needs a series of productivity indices, which should be designed to allow contractors to compare the performance of their projects with other similar projects, and to analyze different type of construction processes in order to identify problem areas and potential for productivity improvement at the source of problems. Appropriate construction productivity measurement provides the basis for determining trends and levels of productivity as well as the impacts of corrective action. It will assist project owners and construction managers: to manage projects effectively; to detect problems and adverse trends for necessary corrective action; to determine impacts of changed construction methods or conditions; to identify high and low areas of productivity and reasons for the differences; to compare project\ud
performance by region; to compare performance of different contractors; and to provide a means to assess cost effectiveness in construction. This paper discusses the method for measuring standard worker’s performance and productivity rates for improving construction cost estimation, and for assisting the definition of worker/job performance standards. Observations had been conducted in selected road and bridge construction projects at 13 provinces in Indonesia. Data obtained from observation of work processes and time measurements at the various construction sites were evaluated and analyzed to obtain productivity and performance indicators at project, regional and national levels.\ud
Non-productive activity time measurement will then be used as a tool to improve the worker performance by introducing corrective and preventive actions for every non-productive working elemen
House keeping management as a strategy to minimize construction waste in high rise building projects
No full textBuilding design and construction has found many interested parties in nearly all sectors\ud
of the economy of the Indonesia. Various studies in developed countries have indicated that one method of improving construction project performance is by managing the construction waste. Project performance can be improved by reducing the unnecessary costs related to waste disposal and excess materials. However, the issues of construction waste have not been a main concern of construction project stakeholders in Indonesia. The Civil Engineering Department of the University of Indonesia has initiated the study on construction waste management in Indonesia. This paper discusses the results from one of the study, which is on construction waste minimization strategy. The main objective of construction waste minimization strategy is to reduce the amount of waste produced, which will lead to more cost effective project operation. This is based on concept that reduced construction waste can: save project cost, reduce excess materials, improve competitiveness, improve work habit, and improve quality of project environment. Construction waste minimization strategy can be implemented at 4 construction areas, namely project planning, preconstruction, off-site activities\ud
and on-site activities. A case study was conducted on a high-rise building project, which integrates its on-site activities on construction waste minimization into the house-keeping management of the project site. By doing this, the contractor achieve cleaner, more organized & tidier project site. In the on-site activities, improved work productivity, and more cost effective project
Identification of the cause of internal factor problems that influence construction company’s performance in Indonesia
No full textIn improving Indonesia construction companies’ ability to compete, anticipative steps\ud
by determining various improvements and corrections in construction companies are needed to increase the company’s quality performance. Several factors that influence and determine the success of a construction company can be grouped into internal factors, external factors, and market forces. Internal factors in a company are important factors and have the effect of approximately 42% towards the company’s success. Management, equipment, human resources, corporate culture and finance dominate the internal factors’ influence towards the success of a construction company. The research objective discussed in this paper is to identify the cause of the problems arise in a construction\ud
company’s internal factors that influence the company’s success performance as a base to develop an ideal construction company business system in Indonesia. The methods used are literature studies and survey for identifying the cause of the problems and the construction company’s success performance indicators. Analyses used in this research are statistical analysis and cluster analysis. The results show the clusters from the problems arise in internal factors that influence the construction company’s performance, which consists of profitable, growth, sustainable, and competitive
Risk analysis in feasibility study of building construction project: case study - PT. Perusahaan Gas Negara Indonesia
No full textInvestment in construction project is able to give higher benefit beside of its high\ud
uncertainty. The uncertainty depends on many risk factors. The influence of the identified risk then has to be evaluated and calculated towards the project feasibility. Before investment, the feasibility of the project has to be done that gives figures of cash flow on the following years. This can be one of the considerations for making a decision whether this project is feasible or not. Risks that overshadow the construction project have to be calculated as an influential factor towards the failure of a project. This paper aims to know the feasibility of project investment by calculating the risk factors and treatment. Risk probability matrix is used to obtain the risk priority, which then continued with financial analysis for the feasibility study and also sensitivity analysis. The study shows that the parameter investment value will be increased when treatment is done on risk
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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