scholarly journals The Cost Monitoring of the Construction Machinery with Using the Stochastic Progress-Based S-curves

2015 ◽  
Vol 10 (1) ◽  
pp. 57-64
Author(s):  
Marek Krajňák ◽  
Renáta Bašková
Keyword(s):  
Performance Status ◽  
Objective Evaluation ◽  
Project Performance ◽  
Execution Plan ◽  
Construction Machinery ◽  
Project Completion ◽  
Final Project ◽  
S Curve ◽  
The Cost ◽  
The Impact

Abstract Contribution presents methodology for evaluating at-completion project performance status. Accurate cost and schedule project forecasts are difficult to generate when considering the impact of such events as unforeseen cost changes, material delays, scope deviation, changes to the project execution plan and poor subcontractor performance. In reality, the original estimate may be considered the first project forecast and at the point of project completion, the latest updated estimate (last forecast) and the actual amount of what is being expended should be the same. Final project performance is determined by comparing the planned budget and project duration, with the expected forecasted final budget and elapsed time. The stochastic S-curve methodology permits objective evaluation of project performance without the limitations inherent in a deterministic approach. This paper used the stochastic S curve to monitor the cost and time consumption in operation of the construction machines. The contribution presents a partial outcome from the dissertation thesis called the Interactive tools for resource optimization in construction.

scholarly journals ANALISIS KETERLAMBATAN PROYEK SERTA DAMPAKNYA TERHADAP BIAYA DAN WAKTU PELAKSANAAN PROYEK

2019 ◽  
Vol 5 (1) ◽  
pp. 13-19
Author(s):  
Fitri Nur Kharina ◽  
Kusno Adi Sambowo
Keyword(s):  
Construction Projects ◽  
Construction Project ◽  
Project Performance ◽  
Project Work ◽  
Earned Value ◽  
Time Period ◽  
Review Period ◽  
The Difference ◽  
The Cost ◽  
The Impact

Construction projects in all regions continues to be developed for the creation of facilities that can be utilized by the community. One of them is the construction of apartments which are now being intensively carried out to meet residential needs for the community. Making a construction project plan always refers to estimates that exist at the time development plan is made, therefore problems can arise if there is a discrepancy between the plans that have been made and the actual reality. So the impact that often occurs is the delay in the time of project implementation which can also be accompanied by an increase in the cost of implementing the project. In the construction project of Cinere Terrace Suites Apartemen & Citywalk, Jakarta there was a delay resulting in a late payment of monthly bill progress by the owner. Based on the above reasons, this research was conducted to find out how the project performance was seen from the cost and time period of the review period. how is the estimated cost and time to complete the overall project work. The method used in the analysis of this study is the Earned Value Method. Based on the results of the analysis carried out for 29 weeks the project performance on schedule has been delayed and cost shows a positive value. For the estimated completion time of the project there is an increase in time whose duration increases from the planned 98 weeks or 685 days to 109,624 weeks or 768 days. While the estimated cost of completing the project from the results of the analysis obtained a value of Rp. 270,147,448,569.16 smaller than the planned cost of Rp. 315,272,727,272.73. With the difference VAC of Rp. 45,125,278,703.57 this shows that there are benefits obtained by the contractor.

scholarly journals STRATEGI PERCEPATAN PROYEK MENGGUNAKAN METODE CRASH PROGRAM (Studi Kasus : Program Kerja Masa Pengeringan Proyek Rehabilitasi Saluran Induk Klambu Kiri Tahun 2017)

2020 ◽  
Vol 25 (2) ◽  
pp. 166
Author(s):  
Eko Marsudi Utomo ◽  
Mochamad Agung Wibowo ◽  
Sriyana Sriyana
Keyword(s):  
Flow Section ◽  
Cropping Pattern ◽  
Cost Component ◽  
Flow Area ◽  
Project Completion ◽  
Normal Duration ◽  
Section Structure ◽  
The Cost ◽  
The Impact ◽  
Predetermined Time

Based on the initial plan from the contract of the Rehabilitation Klambu Kiri’s Project, main channel's work was carried out continously by an open and closed system using the kistdam method. However by the time of execution work, the stakeholders wanted the work in the main channel to be carried out based on cropping pattern, where there a drying period and a drainage period. In this case, flow area and bottom structure of the channel can only be worked during the drying period lasting three months. To be able to determine the impact of these change, a duration calculation is carried out from project's data which are internal's BQ, initial plan's resources, and the relations between activities using Microsoft Project on the flow section structure which be worked in drying period of 2017. The normal duration obtained from analysis is 203 days. It was exceeded time of drying period and possibly could have an impact on the overall project completion schedule resulting in delays, defaults and even termination of contracts. Therefore, it is necessary to have an accelerate strategy of the work on the flow section structure to be completed within a predetermined time. In this study, the acceleration strategy was carried out using crashing analysis in the critical activities from normal duration using Microsoft Project. The crashing method was carried out in stages from the crashing simulation of 30 days, 60 days, to 120 days so that obtained the duration of acceleration was 83 days. The cost component of acceleration is calculated by choosing the lowest cost from the alternatives of increasing work hours (overtime) or by adding resources. From the simulation results, the crash cost to complete the acceleration work is Rp. 1.298.307.591,- or about 2,05% of direct cost, so the efficiency is Rp. 9.692.409,- from normal duration

Impact of Float Loss on the Project Costs

2011 ◽  
Vol 189-193 ◽  
pp. 1532-1537
Author(s):  
Wei Lo ◽  
Yih Tzoo Chen
Keyword(s):  
Critical Path ◽  
Research Result ◽  
Optimal Schedule ◽  
Step Function ◽  
Project Cost ◽  
Traditional Concept ◽  
Project Completion ◽  
Completion Date ◽  
The Cost ◽  
The Impact

Many techniques have been developed to analyze the time impact and the costs caused by the disruptions of the project works. However, most were limited on the delay of the critical path and the overall project completion date. In recent years, although more attention has been drawn on the impact of the float loss on the overall project cost, not a single research result has been widely accepted and recognized. This study aims to fill this gap. This research firstly introduces a resource-integrated genetic algorithms (G.A.) model, which will be used to develop an optimal schedule including the timing and quantity for each type of resource required to complete each individual activity. Secondly, by using a case study this research intends to identify the impact of float loss on overall project cost through comparing the as-planned optimal schedule with an after-impacted schedule. Based on the research results this research has identified that the relationship between the float loss and project cost can be expressed as a step function and the time span of total float can be divided into and cost-related float and cost-unrelated float, termed as optimal float, in which the consumption of float will not cause the delay of the project completion date, nor the increase of project cost. The findings refute the traditional concept that the total float belongs to neither the owner nor the contractor, and suggest that the utilization float is free only within the optimal float and the float apportionment will never be reasonable unless the cost of float floss has been taken into consideration.

Performance-Based Approach for Deciding the Age of New Concrete for Thin Epoxy Overlay Application

2021 ◽  
pp. 036119812110145
Author(s):  
Upul Attanayake ◽  
Abul Fazal Mazumder
Keyword(s):  
Concrete Strength ◽  
Chloride Ion ◽  
Experimental Program ◽  
Project Completion ◽  
Curing Period ◽  
The Cost ◽  
The Impact ◽  
To Receive ◽  
Cost Of Construction ◽  
A Performance

A thin epoxy overlay application is a capital preventive maintenance activity. Epoxy overlays reduce the rate of chloride ion ingress and extend bridge deck service life. Highway agency policies and manufacturer specifications require maintaining a 28-day curing period (7-day wet and 21-day dry curing) before the application of an epoxy overlay on bridge decks requiring new concrete for patches and repairs. Consequently, the contractors wait for 28 days to apply an epoxy overlay. Delaying application time increases project completion time and the cost of construction and mobility. The suitability of new concrete to receive epoxy overlays and the performance of overlays depend on several parameters including concrete strength, moisture, and tendency to crack. Such parameters depend on concrete mixture ingredients and wet and dry curing periods. This paper presents a performance-based procedure for evaluating the possibility of reducing the 28-day waiting period for a thin epoxy overlay application on new concrete. An experimental program was developed and executed to evaluate the impact of epoxy overlay application parameters and overlay performance using a tensile bond pull-off strength test. The results support developing a performance-based procedure for deciding on the suitable age of new concrete to receive a thin epoxy overlay. The pull-off bond strength of epoxy overlays applied at 7, 14, and 21 days, following a 7-day moist curing, shows the possibility of applying an epoxy overlay before the end of the 28-day curing period stipulated in the current specifications.

scholarly journals Analysis of Cost of Rework on Time and Cost Performance of Building Construction Projects in Abuja, Nigeria

2018 ◽  
Vol 5 (1) ◽  
Author(s):  
Emmanuel Chidiebere Eze ◽  
John Ebhohimen Idiake
Keyword(s):  
Significant Relationship ◽  
Construction Projects ◽  
Building Construction ◽  
P Value ◽  
Delivery Time ◽  
Cost Performance ◽  
Project Cost ◽  
Final Project ◽  
The Cost ◽  
The Impact

Rework is a menace that leads to undesired and unnecessary loss of efforts, it degrades project cost and schedule performance of construction projects, both at design and construction phases. This study therefore, analyzed the impact of cost of rework on time and cost performance of building construction projects in Nigerian, using selected commercial building project within the country’s capital. A pro forma was adopted for gathering data on rework cost, project cost and time of selected building projects, while structured questionnaire was used to collect information on the likely measures for reducing rework incidences from construction professionals that were involved in the delivery of the identified projects. Regression analysis, relative importance index and Kruskal-Walis test were employed for data analysis. The study revealed a significant relationship between the cost of rework and initial and final project cost of delivering commercial buildings, as an average of 3.53% impact on the initial project cost, 46.60% contribution to cost overrun, and p-value of 0.000 was observed on all assessed projects. For the project delivery time, a significant relationship between the cost of rework and initial and final project duration, as an average of 7.35% impact on the initial delivery time, extra 19 days and p-value of 0.000 was observed on all assessed projects. Team building and education, management commitment, employee involvement, were some of the best possible measures to minimized rework problems.

scholarly journals ANALYSIS OF PROJECT IMPLEMENTATION SCHEDULE USING MICROSOFT PROJECT (Case Study: Trenggalek City Square Area)

2020 ◽  
Vol 2 (1) ◽  
pp. 25-32
Author(s):  
Muhammad Zainal Muttaqin ◽  
Farida Hardaningrum
Keyword(s):  
Ornamental Plants ◽  
Implementation Process ◽  
Project Implementation ◽  
Time Curve ◽  
Planning Stage ◽  
Project Completion ◽  
S Curve ◽  
The Cost ◽  
Time Planning

A project  implementation  schedule  can be said to be successful  if the implementation  process  can be completed in accordance with the planned time. Planning a good project implementation schedule must be supported by good project control. Because what happens in the field is not necessarily in accordance with what has been planned. By analyzing the cost and end time of project completion, it can provide detailed project performance schedule information. In this study, the analysis of the project implementation schedule is done manually, which is to make the S curve and use the Microsoft Project 2019 program. The method used is to enter the data related to the analysis into the program, then this Microsoft project will calculate automatically according to the formulas. calculation formula that has been made, so that the calculation of the project implementation  schedule  analysis  will be faster and more accurate.  The results of the cost analysis following the price of the Trenggalek district work unit for the renovation of the City Square is IDR. 6,078,136,530. Estimated schedule in planning the S schedule time curve with Microsoft Project 2019, there is a time difference of scheduling 39 calendar days or a difference of 1 month more that can save time and costs of implementing work. At the planning stage of scheduling with an S curve of 20 weeks or 140 days, using Microsoft Project 2019, the results obtained 101 days of project completion time. In the area of ornamental  plants  experiencing  critical  trajectory,  due  to  the  end  of  the  work  that  is expected  to  be completed and handover, so it must add workers to be on target

OVE's Review of Project Completion Reports (PCRs) and Expanded Supervision Reports (XSRs): The 2020 Validation Cycle

2020 ◽  
Author(s):  
Maria Fernanda Rodrigo ◽  
Claudia Figueroa ◽  
Oliver Peña-Habib ◽  
Xiomara Rojas-Asqui ◽  
Melanie Putic
Keyword(s):  
Assessment Tool ◽  
Project Performance ◽  
Development Bank ◽  
Implementation Phase ◽  
Project Completion ◽  
Final Project ◽  
Development Effectiveness ◽  
Project Monitoring ◽  
Self Assessments ◽  
Project Supervision

This report summarizes the results of the Office of Evaluation and Oversight's (OVE) annual validation of the self-assessments of project performance and results completed by the Inter-American Development Bank (IDB) and IDB Invest in 2019-2020. The IDB and IDB Invest have systems in place to measure the development effectiveness of their operations. These systems use a number of instruments to assess projects at the design, implementation, and completion phases. The design-phase assessment uses a “Development Effectiveness Matrix” (DEM) for sovereign guaranteed (SG) operations. The effectiveness of non-sovereign guaranteed (NSG) operations is measured with a “Development Effectiveness Learning, Tracking, and Assessment tool” (DELTA). Implementation-phase assessments measure SG operations with “Project Monitoring Reports,” while NSG operations are assessed with “Project Supervision Reports.” Upon completion, SG projects are self-evaluated with “Project Completion Reports,” or PCRs. NSG operations, use “Expanded Supervision Reports,” or XSRs when they reach early operation maturity (EOM). OVE validates Managements self-evaluations (PCRs and XSRs) and assigns a final project performance rating to each operation. As part of the 2020 validation cycle, OVE reviewed PCRs for 63 operations, 62 with operational closure (CO fully justified) in 2018 and one in 2013. XSRs were reviewed for 36 IDB Invest operations that had reached early operating maturity (EOM) in 2018.

Analysis of causes and impact of variation order on educational building projects

2016 ◽  
Vol 14 (2) ◽  
pp. 139-164 ◽  
Author(s):  
Luqman Oyekunle Oyewobi ◽  
Richard Jimoh ◽  
Bashir Olanrewaju Ganiyu ◽  
Abdullateef Adewale Shittu
Keyword(s):  
Average Cost ◽  
Project Performance ◽  
Project Delivery ◽  
Construction Process ◽  
Building Projects ◽  
Content Type ◽  
Time Performance ◽  
Significant Difference ◽  
The Cost ◽  
The Impact

Purpose Construction process is complex and traditionally fragmented; thus, it is almost impossible to have a project completed without changes to the original plan or the construction process. The purpose of this study is to identify and examine the causes of variation orders, ascertain their effects and establish the cost and time performance implication as a result of variation orders. Design/methodology/approach This study obtained information from 90 construction stakeholders on 30 completed educational building projects to ascertain the causes and effects of variation orders on project delivery using questionnaire survey. In addition to this, a pro forma document was designed to obtain the project characteristics, cost and time data from these 30 completed educational building projects. Factor analysis was used to categorise the causes of variation orders, while severity index was used to examine their effects on project delivery. The hypothesised statement was tested using paired t-statistics to examine whether a statistically significant difference existed between variation orders, cost and time performance of the projects. Findings The study identified 13 main factors as causes of variation orders and the results revealed that the most frequent effects of variations were increase in construction costs, time, client dissatisfaction, increase construction project rework and demolition and project abandonment. The results also showed that variation orders had significant effects on both cost and scheduled performance of the educational building projects with average cost and time escalation of 33.95 and 29.45 per cent of the original project cost and time, respectively, for the entire projects studied, while average cost implication of variation orders is 23.79 per cent. Practical implications The findings in this study will be of assistance to government agencies and management of public works in higher institutions of learning in managing variations in construction projects. The study will also add to the current literature on the impact of variation orders on educational building projects in developing countries. Finally, it will create the much-needed awareness on the severity and implication of change or variation orders on project delivery. Originality/value The study identified and examined the causes of variation orders, ascertained their effects and established the cost and time effects of the causes of variation order on project performance. This will assist project initiators, contractors, consultants and other stakeholders to fully appreciate and understand the significant effects of variation orders on project performance.

scholarly journals RENCANA ANGGARAN BIAYA DAN METODE PELAKSANAAN PADA PROYEK PEMBANGUNAN JALAN AKSES PELABUHAN PERIKANAN LAMPULO STA 0+-000 SID 1+-013 KOTA BANDA ACEH

2018 ◽  
Vol 8 (2) ◽  
Author(s):  
Muhammad Irfan
Keyword(s):  
Efficient Manner ◽  
Final Project ◽  
Road Width ◽  
Implementation Time ◽  
Implementation Method ◽  
Base Course ◽  
S Curve ◽  
Access Project ◽  
The Cost ◽  
Banda Aceh

Lampulo Fishing Port Road Access Project, Banda Aceh City with 1013 m of road length, 10 m road width, base course layer 15 cm thickness, subcase 20 cm layer, 6 cm surface Aspalt Concrete Binder Course (AC BC) and Talud work . This Final Project aims to determine the method of implementation and budget costs on the project. The calculation of the Budget Plan uses the EI Analysis (Estimated Index) to calculate the cost of Sub Base, Base Course, Prime Coat, Surface Aspalt Concrete Binder Course (AC-BC), and Talud work. In this calculation, the cost for Sub Base work is Rp.1.027.631.772,00, -. Work Base Course Rp.970.243.296, 00, -. Prime coat job Rp.121.358.725,00, -. Surface layer work Aspalt Concrete Binder Course (AC-BC) Rp.1.906.855.195,00, Talud Work Rp.2.639.141.122, 00, -. So the total cost of the budget is Rp.6.695.230.109, 00. As well as scheduling the implementation time using the curve S. The preparation of the Implementation method applied to the Project includes Sub Base, Base Course, Prime Coat and Surace Aspalt Cpncrete Binder Course (AC-BC) work in an effective and efficient manner based on the drawing of the plan.Keywords: Budget Costs, S Curve, and Methods of Accounting.

scholarly journals Modernisation of Regional Roads Evaluated Using Ex-Post CBA

2021 ◽  
Vol 13 (4) ◽  
pp. 1849
Author(s):  
Petr Halámek ◽  
Radka Matuszková ◽  
Michal Radimský
Keyword(s):  
Traffic Accidents ◽  
Net Present Value ◽  
Project Completion ◽  
Post Evaluation ◽  
Ex Post ◽  
Measurement Results ◽  
The Subject ◽  
The Cost ◽  
Serious Injuries ◽  
The Impact

The aim of this evaluation is to verify the telling value of the Cost and Benefits Analysis (CBA) of regional roads modernisation based on an ex-post evaluation of the investments and their impacts on the incidence of traffic accidents. A set of 144 projects were the subject of evaluation. The analysis of the actual investment costs confirmed the assumption that the majority of projects were planned with a sufficient provision. When compared with the costs foreseen for the entire set of projects, the total reduction of actual costs spent was over 11%. The investigation of project impacts on traffic accidents was based on an analysis done prior to and after construction by using the Czech Police database. The measurement results show only minimum changes in the incidence of traffic accidents in the scenario prior to and after project completion. This however strongly contradicts the project goals declared, because the projects were anticipating almost zero accidents with a fatality and a 50% reduction of accidents with health consequences. However, a slight increase in road fatalities and in light and serious injuries was measured. These facts have a significant impact on the Net Present Value (NPV) and the weighted profitability index for the entire set of projects dropped from 16.7% to −2.8%. The key recommendation is to eliminate the impact on traffic accidents in the case of project evaluations processed ex-ante for projects focused only on a reconstruction or modernisation of existing roads.

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