The Effects of Design Information on Reliability of Progress and Cost Estimates of Construction Projects: The Case of Two Civil Engineering Projects

Agyeman, Stephen

doi:10.11648/j.ajce.20160406.19

Cited by 5 publications

(4 citation statements)

References 30 publications

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“…In Ghana, Ghanaian construction industry contracts are often awarded not to the experts in the industry but people with political and social linkages that lack management, planning, cost control and site management skills (Sei-Tutu et al, 2010). Many of the contractors cannot interpret the architectural, engineering drawings and specifications by the design consultants, and these results in construction problems (Agyeman et al, 2016). Variation normally arises due to improper planning of managers in the industry which then leads to huge cost implication on projects.…”

Section: Variation Of Workmentioning

confidence: 99%

Rethinking the challenges to the pricing of projects in the Ghanaian construction industry

Kissi

Ahadzie

Adjei-Kumi

et al. 2017

JEDT

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Purpose The aim of the paper is to examine the challenges to the pricing of construction projects in the Ghanaian industry. This remains a persistent problem among construction stakeholders because price is the basis for which offers are made. Project stakeholders are always faced with challenges relating to effective and efficient pricing system making it difficult to achieve value for money. Design/methodology/approach Research data were collected through a questionnaire survey involving quantity surveyors in the Ghanaian construction industry. Data collected were analyzed using exploratory factor analysis which helped to reduce the factors into six components. Confirmatory factor analysis (CFA) was further carried out to explore whether these six observed variables would form a latent variable called challenges to pricing of construction projects. Findings The paper highlighted six underlying challenges which were cost-related, managerial-related, quality-related, variation of works, poor understanding of the terms of contract and time-related. Strong and significant relationships were found between all six of the observed variables. A CFA confirmed that they formed a latent variable the authors called challenges to pricing of construction projects. Research limitations/implications The findings clearly can serve as a reference for both developed and developing countries in the quest for finding an antidote to pricing challenges. In addition, use of CFA improves measurement of the constructs and thus enhances understanding of the underlying components of a construct and their individual relationship with pricing. The paper is particularly useful for policy making and industry regulation because it identifies some of the factors that need attention. Originality/value This paper presents an exceptional contribution to the construction management literature by concentrating on the factors that challenge effective and efficient pricing system in the construction industry.

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Section: Variation Of Workmentioning

confidence: 99%

Rethinking the challenges to the pricing of projects in the Ghanaian construction industry

Kissi

Ahadzie

Adjei-Kumi

et al. 2017

JEDT

View full text Add to dashboard Cite

show abstract

“…The importance of the construction industry in the national development and economic growth of any nation cannot be underestimated. [1] argues that the construction industry is noted to represent one of the most important industries in a nation's development especially in the developing countries. As a result, efforts are being made at all levels of the national socioeconomic level to develop the construction industry to enable them to reach their potential.…”

Section: Background To the Studymentioning

confidence: 99%

External Market Conditions that Affect Cost of Tendering in Public Institutions: Evidence from Ghana

Amoateng¹,

Osei²

2017

BJEMT

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The study examined the external factors or low visibility factors that affect the accuracy of pre-tender estimate among building contractors of public institutions in the Brong and Ashanti Regions of Ghan a. The study was structured within the framework of descriptive research approach. The study was conducted between August, 2016 and March, 2017. Building contractors who had registered with the various public institutions within the Ashanti and Brong Ahafo Regions of Ghana constituted the population of the study. The public institutions randomly selected for the study included: Tertiary Institutions, District, Municipal and Metropolitan Assemblies, Hospitals and other Ministries, Departments and Agencies (MDAs). Twenty (20) public institutions and sixty (60) registered construction firms were randomly chosen for the study. Self-administered questionnaire was used to obtain data from the respondents. The study found that the five most important factors that affect the accuracy of cost of tendering are: Material (prices, availability, supply, quality etc.); Currency exchange fluctuations, prevailing economy conditions, labour cost and availability and cost, availbility and supply of equipment. The study thus concludes that external factors affect the accuracy of tender estimates among construction firms. It is recommended that the performance of

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“…Corrective project planning, hiring workers with adequate skills set, and availability of materials and equipment are identified as important factors in order to have a successful project [171], [144], [169], [167], [255], [188], [122], [43], [279], [168], [8], [198], [90], [89], [55], [229], [178], [254], [189], [154], [184], [237], [69], [98], [177], [141], [128], [134], [295], [160], [246], [10], [11], [14], [61], [97], [120], [130], [135], [195], [182], [228], [231] [276].…”

Section: Project Management Approach Conceptmentioning

confidence: 99%

“…(9) Minimizing the construction project wastes and reducing the causes of defects. (10) Having improvements in the main three project's factors time, quality and cost. In general,…”

Section: Lean Construction Benefits and Barriersmentioning

confidence: 99%

Lean construction versus Project Management in road projects : scheduling comparison

Elkherbawy¹

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Lean Construction is regarded as an innovative approach of management for various types of projects in the field of construction. As much as it is currently applied in some countries, its expansion is inevitable, for better overall results are obtained and the projects’ objectives are met more precisely. Despite the fact that Lean Construction offers solutions to many problems occurring under the traditional management approach known as the Project Management (PM), the scope of its application is not as promising. Countries where Lean Construction is minimally applied include the United States of America and the United Kingdom besides other countries in Europe and Latin America. However, it is still not applied to a more exhaustive extent in these countries and is completely missing in many others around the world. This study primarily focuses on the application of Lean Construction to Infrastructure, specifically road projects; investigating Lean Construction solutions to the time wastes. Through conducting a case study research, this work focuses on investigating the impact of applying Last Planner System as a Lean Construction tool on the elimination of Non-Value Added (NVA) activities, that is, wastes in a highway project in Cairo, Egypt. This study includes a State of Art on both Project Management approach and Lean Construction. The study applies a comparative approach between the application of Project Management approach and Lean Construction in road projects. Hence, the researcher conducted different simulations of the studied road project, taking into account the two approaches (Project Management and Lean Construction), then obtaining the simulations results. Two parameters are used as comparison criteria: Percentage Plan Complete (PPC) and Percentage Activity Waste (PAW). The later (PAW) is a new parameter introduced by the researcher to investigate its results before/after applying the Lean Construction tools. Findings of the study support the research hypothesis that the application of Lean Construction approach to road projects enhances productivity through eliminating time-related wastes and decreasing the project duration. This research supports the argument that road projects can benefit greatly from the application of Lean Construction instead of the traditional approach. Lean Construction es considerado como un enfoque innovador para la gestión de diversos tipos de proyectos en el campo de la construcción. Por más que se aplique actualmente en algunos países, su expansión es inevitable, ya que se obtienen mejores resultados generales y los objetivos de los proyectos se cumplen con mayor precisión. A pesar del hecho de que Lean Construction ofrece soluciones a muchos problemas que ocurren bajo el enfoque de administración tradicional conocido como Gestión de Proyectos (Project Management, PM), el alcance de su aplicación no es tan prometedor. Los países en los que se aplica mínimamente el Lean Construction son los Estados Unidos de América y el Reino Unido, además de otros países de Europa y América Latina. Sin embargo, todavía no se aplica de manera más exhaustiva en estos países y está completamente ausente en muchos otros en todo el mundo. Este estudio se centra principalmente en la aplicación de el Lean Construction a Infraestructura, específicamente en proyectos viales; Investigando soluciones de Lean Construction para los desperdicios del tiempo. A través de la realización de una investigación de estudio de caso, este trabajo se enfoca en investigar el impacto de la aplicación del Sistema Last Planner como una herramienta Lean Construction en la eliminación de actividades sin valor agregado (NVA), es decir, desechos en un proyecto vial en El Cairo, Egipto. Este estudio incluye un estado del arte tanto en el enfoque de gestión tradicional de proyectos Project Management como en Lean Construction. El estudio se aplica a un enfoque comparativo entre la aplicación del enfoque de el Project Management y el Lean Construction en proyectos viales. Por lo tanto, el investigador realizó diferentes simulaciones del proyecto de carretera estudiado, teniendo en cuenta los dos enfoques (Project Management y Lean Construction), y luego obtuvo los resultados de las simulaciones. Se utilizan dos parámetros como criterios de comparación: Plan de porcentaje completado (PPC) y Porcentaje de residuos de actividad (PAW). El último (PAW) es un nuevo parámetro introducido por el investigador para investigar sus resultados antes / después de aplicar las herramientas de el Lean Construction. Los hallazgos del estudio apoyan la hipótesis de la investigación de que la aplicación del enfoque de Lean Construction a los proyectos viales aumenta la productividad al eliminar los desechos relacionados con el tiempo y disminuir la duración del proyecto. Esta investigación apoya el argumento de que los proyectos viales pueden mejorarse en gran medida con la aplicación de el Lean Construction en lugar del enfoque tradicional el Project Management.

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The Effects of Design Information on Reliability of Progress and Cost Estimates of Construction Projects: The Case of Two Civil Engineering Projects

Cited by 5 publications

References 30 publications

Rethinking the challenges to the pricing of projects in the Ghanaian construction industry

Rethinking the challenges to the pricing of projects in the Ghanaian construction industry

External Market Conditions that Affect Cost of Tendering in Public Institutions: Evidence from Ghana

Lean construction versus Project Management in road projects : scheduling comparison

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