scholarly journals S-curve modelling in early phases of construction projects

2012 ◽  
Vol 64 (8) ◽  
pp. 647-654
Keyword(s):  
Construction Projects ◽  
S Curve ◽  
Early Phases

scholarly journals A Case Study of S-Curve Analysis: Causes, Effects, Tracing and Monitoring Project Extension of Time

2021 ◽  
Vol 7 (4) ◽  
pp. 649-661
Author(s):  
Habib Musa Mohamad ◽  
Mohamad Ibrahim Mohamad ◽  
Ismail Saad ◽  
Nurmin Bolong ◽  
J. Mustazama ◽  
...  
Keyword(s):  
Construction Projects ◽  
Curve Analysis ◽  
Sustainable Construction ◽  
Life Project ◽  
Contract Administration ◽  
Long Run ◽  
Application Techniques ◽  
S Curve ◽  
Project Delay

S-Curve analysis in the construction interpreted as managing project with knowledge and traceable in the context of sustainable construction while displays the cumulative costs, labour hours or other quantities plotted against time. In the contract administration, delays in completing a construction project led to the breach of contract but, in contracts itself allow the construction period to be extended where there are delays that are not the contractor's fault. Under those circumstances, a presentation of a case-study regarding the analysis of S-Curve of a life project drew comparative interpretation of project performance towards project delivery schedule has been conducted in private initiative project. This study aims to investigate and examine the factors that cause delays in construction projects from the perspective of S-curve representations. The paper aims to provide in depth light about the existing causes of project delay and describe the key sources of financing problem and identify the consequences of contraventions of contract. Two distinct parts divided which are refers to the methods used to assess the perceptions of clients, consultants, and contractors on the relative importance of causes of delay in a project and referred to the procurement and documentation to analyse the delay. As a result, an Extension of Time (EOT) granted and identically changed the progress towards extension time where better planning demanded for improvement and restoration progress kept on track. This paper presented a practical and comparative S-Curve within extension of time to ensure delivery of project on schedule. In the long run, the identified causes are combined into 16 factors. Finally, the result of this match was brought in order to critically understand and provide a guideline to contractor in preparing EOT application and choose reliable factor based on the specific circumstances of project delay factors thorough review conducted to reveal the nature of EOT application techniques. Doi: 10.28991/cej-2021-03091679 Full Text: PDF

scholarly journals Assessing the influence of project management on quality during the early phases of construction projects

2018 ◽  
Vol 9 (1) ◽  
pp. 1584-1592 ◽  
Author(s):  
Žanesa Ljevo ◽  
Mladen Vukomanović ◽  
Suada Džebo
Keyword(s):  
Project Management ◽  
Construction Projects ◽  
Quality Factors ◽  
Important Indicator ◽  
Basic Set ◽  
Quality Of Products ◽  
Amount Of Knowledge ◽  
The Impact ◽  
Early Phases

AbstractAlthough the quality of a process affects the quality of the end product, there is currently an insignificant amount of knowledge about the quality of project management (PM) processes that directly affect the quality of the delivered product (constructed building). This study presents a proposal for modeling the impact of the quality of the PM process on the quality of the constructed building. The quality of the PM process is represented by the main quality factors and product quality indicators. It presents the results of the interviews that were conducted and study cases that were analyzed in Bosnia and Herzegovina with a variety of project participants (with different managerial perspectives) in terms of the indicators of quality of the delivered product. All participants, regardless of managerial perspective, believe that the most important indicator of the quality of products for each phase of the project is “customer satisfaction in the end phase”, the measurement of which is different for each project phase that is presented. The results of the factor analysis of the definition and the planning phases show that 11 variables, namely, the quality factors of the PM process, can be grouped into three new factors, which is described as 66.61% (77.046%) of the basic set of variables.

scholarly journals Use of artificial intelligence for estimating cost of integral bridges

2021 ◽  
Vol 73 (03) ◽  
pp. 265-273
Author(s):  
Stjepan Lakusic
Keyword(s):  
Neural Network ◽  
Artificial Intelligence ◽  
Cost Estimation ◽  
Construction Projects ◽  
Mean Absolute Error ◽  
Absolute Error ◽  
Estimation Model ◽  
Construction Costs ◽  
The Mean ◽  
Early Phases

Estimation of costs is important in every phase of realisation of construction projects. However, the influence of cost estimation is the highest in early phases as it is then that the decision about accepting the job or withdrawing from the project is made. The quantity of data available in initial phases of the project is smaller compared to subsequent phases, which affects accuracy of cost estimation in such early phases. A research making use of artificial intelligence to estimate construction costs of integral road bridges is presented in the paper. The estimation model is prepared by means of neural networks. The best neural network model has proven to be highly accurate in the estimation of costs based on the mean absolute error, which amounts to 13.40 %.

scholarly journals The S-curve for forecasting waste generation in construction projects

2016 ◽  
Vol 56 ◽  
pp. 23-34 ◽  
Author(s):  
Weisheng Lu ◽  
Yi Peng ◽  
Xi Chen ◽  
Martin Skitmore ◽  
Xiaoling Zhang
Keyword(s):  
Construction Projects ◽  
Waste Generation ◽  
S Curve

A pragmatic approach to using resource loading, production, and learning curves on construction projects

1994 ◽  
Vol 21 (6) ◽  
pp. 939-953 ◽  
Author(s):  
R. Max Wideman
Keyword(s):  
Learning Curve ◽  
Construction Projects ◽  
Learning Curves ◽  
Construction Work ◽  
Productivity Improvement ◽  
Resource Loading ◽  
New Construction ◽  
The Difference ◽  
S Curve ◽  
Resource Input

The purpose of this paper is to present some rules of thumb, based on experience, for the early planning of new civil and building construction work. In such construction, resource input (men, materials, equipment, etc.) is varied according to the planned timing and availability of the work. On a well-run site, this resource loading as well as its consequent output follows a distinctive pattern within relatively narrow limits for the whole of the job. Practical considerations of why this should be so are presented.Based on experience, this paper suggests first approximation profiles for both typical resource loading and progress S-curves and shows that the difference could be due to the effects of learning. The basis for calculating the shape of the learning curve and how the application of this concept is limited on a construction site are described. The manner in which an alternative learning curve calculation can be more useful in tracking progress is demonstrated. The significance of these profiles and their relationships for improved planning and tracking of new construction work is suggested. An example of the output from a less well managed project as compared to the planned S-curve is also included. Key words: learning curve, productivity improvement, progress (production) curve, resource loading.

IMPLEMENTING CONTRACTOR KNOW-HOW IN EARLY PHASES OF COMPLEX INFRASTRUCTURE PROJECTS

2019 ◽  
Vol 6 (1) ◽  
Author(s):  
Lena Paar ◽  
Cornelia Ninaus ◽  
Detlef Heck
Keyword(s):  
Project Management ◽  
Construction Industry ◽  
Construction Projects ◽  
Construction Project ◽  
Infrastructure Projects ◽  
Know How ◽  
New Approaches ◽  
European Guidelines ◽  
Project Phases ◽  
Early Phases

The importance of bringing contractor know-how into early construction project phases has long been recognized by the construction industry. Although experts and practitioners have considered new forms of procurement and management for construction projects, no significant solutions have been identified until now. It should be mentioned in this context that the Austrian government initiated the implementation of a new procurement approach in 2015 by reducing the opportunity for public clients to award the contract to the bid with the lowest price in conformity with the European guidelines. Austria's infrastructure industry is thus seeking new approaches that are able to implement the know-how of all parties involved in a project. The aim of this paper is to identify possibilities for early contractor involvement and its potential for optimizing the project management in the Austrian infrastructure industry.

scholarly journals Methodology of Planning the Course of the Cumulative Cost Curve in Construction Projects

2020 ◽  
Vol 12 (6) ◽  
pp. 2347
Author(s):  
Jarosław Konior ◽  
Mariusz Szóstak
Keyword(s):  
Construction Projects ◽  
Construction Project ◽  
Cost Curve ◽  
Cumulative Cost ◽  
Implementation Time ◽  
S Curve ◽  
Real Costs ◽  
Over Time ◽  
Construction Works

Appropriate planning and effective monitoring of the execution of construction projects is important with regard to their successful sustainment of implementation. Time and cost are key elements that determine the success or failure of construction projects. The obtaining of a rational S-curve course before the start of a construction project that reflects reality is important for all the participants involved in implementing an investment task. The article proposes an original methodology for planning the course of the cumulative cost curve in construction projects. It uses a method of shaping the S-curve, which is well-known in both literature and practical approaches. On the basis of the authors’ own research carried out in a homogeneous research group of hotel facilities, the areas of the curve for the correct planning of costs in construction projects were designated, which determine the boundaries of the predicted costs accumulated over time. The data for the development of the authors’ research methodology is the result of the authors’ own experience and professional work. The authors carried out Bank Investment Supervision in the years 2006–2019 on behalf of the banks that grant investment loans for non-public contracts. Knowing the total cost and duration of the planned construction project, which were determined on the basis of project documentation, cost estimates, and also their own database regarding planned and completed deadlines and budgets of similar investments, 6th degree polynomials of the real costs of the construction works were determined. This approach enabled the correct planning of costs over time and the determination of planned monthly amounts of construction works to be executed.

scholarly journals Use of the bar chart/S-curve and computerized precedence diagram method on scheduling and controlling building construction projects by contractors: a cross-sectional study

F1000Research ◽  
2021 ◽  
Vol 10 ◽  
pp. 284
Author(s):  
Putri Lynna Adelinna Luthan ◽  
Nathanael Sitanggang ◽  
Abdul Hamid ◽  
Bambang Hadibroto
Keyword(s):  
Construction Projects ◽  
Critical Path ◽  
Cross Sectional Study ◽  
Building Construction ◽  
Project Work ◽  
Cross Sectional ◽  
Diagram Method ◽  
Study Programs ◽  
S Curve ◽  
The Right

Background: Building construction projects have very complex activities, so they require precise and accurate methods of scheduling and control. Using the right method, the project executor can carry out the project according to plan and any schedule deviations can be controlled effectively. This study aims to compare the effectiveness of using the bar chart/S-curve and computerized precedence diagram method (PDM) on scheduling and controlling building construction projects. Methods: The use of the two methods and their effectiveness during project work were analysed using a survey directed to building construction workers. Results: A total of 50 workers completed the survey. The use of PDM (using Microsoft Project) was significantly more effective than the bar chart/S-curve method in scheduling building construction projects (t count 15.516> t table 2.660) and controlling building construction projects (t count 17.233> t table 2.660). In addition, PDM was associated with allowing the project to find the critical path more quickly, overcoming project delays more effectively. Conclusions: By using PDM, a on a building construction project’s schedule for the implementation of the work can be changed immediately, if there is a delay or deviation of work. The findings of this study are useful for construction service companies and the development of construction management science in civil engineering study programs.

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