scholarly journals Importance Performance Analysis of Factors Causing Reworks in the Construction Industry

2020 ◽  
Vol 22 (2) ◽  
pp. 52-58
Author(s):  
Andi Andi ◽  
Jani Rahardjo ◽  
Fendy Fendy
Keyword(s):  
Performance Analysis ◽  
Construction Industry ◽  
Questionnaire Survey ◽  
Construction Project ◽  
Related Factors ◽  
High Importance ◽  
Design Changes ◽  
Two Factors ◽  
Negative Effect ◽  
Level Of Difficulty

Rework can bring negative effect to construction project. This research aims to identify the importance level of factors causing reworks in structural, finishing, and mechanical, electrical and plumbing (MEP) works by a way of importance performance analysis (IPA). In order to reach this objective, the research evaluates the degree of occurrence the factors in each type of works and analyzes the level of difficulty in preventing the occurrence of the factors. The results are based on questionnaire survey, involving general and MEP contractors in Surabaya. Design related factors are the most frequent and most difficult to prevent in structural and finishing works. In MEP works, the most frequent factors are tight construction duration and unclear instructions from owner and designer; whilst insufficient owner’s capital is the most difficult to prevent. The research finds two factors that have high importance level, i.e. design changes and insufficient detail drawings.

scholarly journals External Quality of Mandarins: Influence of Fruit Appearance Characteristics on Consumer Choice

Foods ◽  
2021 ◽  
Vol 10 (9) ◽  
pp. 2188
Author(s):  
Paula Tarancón ◽  
Amparo Tárrega ◽  
Mónica González ◽  
Cristina Besada
Keyword(s):  
Consumer Choice ◽  
Consumer Perception ◽  
Related Factors ◽  
Two Factors ◽  
Negative Effect ◽  
Quality Control Criteria ◽  
Orange Colour ◽  
Negative Characteristic ◽  
Purchase Situation ◽  
Control Criteria

In a pre-purchase situation, consumer perception of mandarin quality is almost exclusively based on fruit appearance. Determination of consumer requirements in this regard is needed to preserve the current success of this crop in markets worldwide. In this study, the effect on consumer choice of different appearance characteristics that can occur mainly in early-season mandarins was quantified. Two independent Choice-Based Conjoint Analyses were performed to evaluate the effect of different external mandarin factors: (1) two factors linked mainly with harvesting practices: ‘Leaf’ (no leaves but sound calyx/fresh leaf/dehydrated leaf) and ‘Rind Colour’ (orange colour/rind with slightly greenish areas); (2) three factors related to postharvest handling: ‘Calyx Condition’ (sound/blackening/detached),’Waxing’ (absence/presence of wax), and ‘Rind Condition’ (dehydrated/turgid). A total of 280 consumers participated in each study. The evaluation of the factors linked with harvesting revealed four different choice patterns. Leaf presence was appreciated only by a small group of consumers (20%), and the presence of greenish areas on the rind was perceived mostly as a negative characteristic. Among the evaluated postharvest-related factors, ‘Waxing’ and ‘Calyx condition’ had the strongest effect on consumer choice. Consumers showed marked preferences for mandarins that had been waxed and presented shine and gloss. Calyx blackening and detachment had a negative effect mainly on waxed fruit, while rind dehydration more negatively affected the fruit that had not been waxed. Consumer perception of mandarin quality is importantly affected by external mandarin characteristics. The information herein reported can be very useful for the citrus industry for adapting quality control criteria that respond to consumer demands.

Performance Appraisal Amongst Contractors in Construction Project in Malaysia

2015 ◽  
Vol 735 ◽  
pp. 154-158
Author(s):  
Siti Hafiza Mat Yahya ◽  
Syuhaida Ismail
Keyword(s):  
Performance Appraisal ◽  
Construction Industry ◽  
Questionnaire Survey ◽  
Construction Project ◽  
Project Managers ◽  
The Poor ◽  
Construction Works

Contractors are one of the important parties in completing a construction project as they directly involved in the construction works execution. Therefore, contractors’ performance should be monitored and assessed on a regular basis to ensure the success of the project, particularly by identifying the failures and shortfalls, as well as any delays and losses that might occur due to the poor productivity of the contractors. A systematic performance appraisal is one of the endeavours in ensuring that the contractors’ performance is as per the expectation of the stakeholders, particularly the client. Hence, this paper provides a review on the contractors’ performance appraisal practices in construction industry in Malaysia. Questionnaire survey on 214 respondents from construction industries, ranging from contractors to project managers, was undertaken where the results showed that contractors’ performance appraisal in a particular construction project is very essential as it drives the project towards better improvement and ultimate success.

scholarly journals COVID-19 pandemic impact: an identification of the cause of cost overrun in construction project

2021 ◽  
Vol 331 ◽  
pp. 01014
Author(s):  
Yervi Hesna ◽  
Jati Sunaryati ◽  
Ayu Hidayati
Keyword(s):  
Construction Industry ◽  
Construction Project ◽  
Health And Safety ◽  
Cost Overrun ◽  
Project Cost ◽  
Heavy Equipment ◽  
Two Factors ◽  
Implementation Time ◽  
The Cost ◽  
The Impact

The paper provides a thorough examination of the impact of COVID-19 on increasing the cost of the construction project. The pandemic of COVID-19 had disrupted the financial and operational of the construction industry. Many projects have been closed and suspended, and this situation has caused great uncertainty in the construction industry. Even though the Instruction of the Minister of Public Work No. 2/2020 issued March 27, 2020, stated that construction activities in Indonesia could continue work. However, it still believes COVID-19 can lead to poor project cost performance. The study used a literature review to explore the factors contributing to the increase in project cost. A case study in the hotel construction project is used to test the factors. The research found six factors have a frequency of occurrence for each cause of cost overrun, namely labor, material, implementation time, project financial aspects, estimated cost, and occupational health and safety. The case study’s two factors are not the cause of the cost overrun based on the interviewee’s answer: heavy equipment and overhead. This paper also explains the mechanism to address cost overrun continue in construction work.

scholarly journals Delays in construction works in Polish construction industry from the contractors’ point of view

2018 ◽  
Vol 222 ◽  
pp. 01008 ◽  
Author(s):  
Anna Kowalczyk ◽  
Wiesław Meszek ◽  
Mariusz Rejment ◽  
Agnieszka Dziadosz
Keyword(s):  
Construction Industry ◽  
Questionnaire Survey ◽  
Construction Project ◽  
Point Of View ◽  
Protective Measures ◽  
Efficient Management ◽  
Investment Process ◽  
The Impact ◽  
Construction Works

The construction industry is sensitive to changing random conditions that determine the occurrence of various disturbances during the construction investment process. These disturbances are the source of numerous delays during realization of the construction project. The identification of the reasons for delays and their impact on the progress of construction works allows for the efficient management of the construction project and planning of protective measures, which reduce the risk of their occurrence. The purpose of this article is to identify and then to assess, on the basis of the conducted questionnaire survey, the impact of disturbances on delays in construction works. In addition, the factors were ranked in terms of the degree of impact on the construction project by calculating the rank of the factor.

Construction Project Performance: Inhibiting Factors for Stakeholder

2021 ◽  
Vol 107 ◽  
pp. 209-214
Author(s):  
Chikezirim Okoroafor ◽  
Ayodeji Olatunji Aiyetan
Keyword(s):  
Project Management ◽  
Construction Industry ◽  
Time Management ◽  
Construction Material ◽  
Construction Project ◽  
Construction Materials ◽  
Project Performance ◽  
Related Factors ◽  
Construction Machinery ◽  
Under Performing

Globally, the construction industry is a catalyst for economic development. This is because it is the bedrock for economic activities. Over the years, the construction industry has been criticised for under-performing which brings about a decline in productivity. In order to improve construction project performance for infrastructural delivery, there are factors to be considered, inter alia, construction material related factors, construction machinery related factors, and project management related factors. In achieving this objective, a questionnaire survey was expedited to purposive practioners to evaluate the relative importance index of these factors. The paper reveals that in the category of construction material related factors, unsuitable locations for material and late delivery of construction materials topped the list with a MS value of 4.53 and 4.15, respectively; in the category of construction machinery related factors, poor maintenance of tools and machinery and difficulties in hiring construction tools and machinery topped the list with a MS value of 4.54 and 4.50, respectively; while in the category of project management related factors, efficient time management and project quality management topped the list with a MS value of 4.83 and 4.70, respectively. In addition, performance improvement factors were also highlighted.

scholarly journals Causes and Effects of Cost Overrun on Construction Project in Bahrain: Part I (Ranking of Cost Overrun Factors and Risk Mapping)

2017 ◽  
Vol 11 (7) ◽  
pp. 20 ◽  
Author(s):  
Hedaya A. M. Abusafiya ◽  
Saad M. A. Suliman
Keyword(s):  
Construction Industry ◽  
Construction Projects ◽  
Construction Project ◽  
Extensive Literature ◽  
Cost Overrun ◽  
Construction Sector ◽  
Cost Performance ◽  
Expert Opinions ◽  
Schedule Delay ◽  
Design Changes

Cost performance is one of the basic criteria for measuring construction project success. Despite its proven importance it is not uncommon to see a construction project failing to achieve its objectives within the specified cost. The paper attempts to identify the major causes of cost overrun in Bahrain construction sector, and to assess the effect of these causes on cost overrun.  A list of these causes was collected through an extensive literature review, historical construction projects records and expert opinions. In total 45 factors were short-listed to be made part of questionnaire used in a survey conducted with representatives from local contracting, consulting, and client firms. Findings are presented in form of tables that classify cost overrun factors, and their ranking. The overall results showed that frequent design changes, mistakes during construction, and schedule delay were considered as the most important factors of cost overrun causes in Bahrain construction industry.

scholarly journals EXAMING THE PRACTICE OF MANGEMENT ASPECTS AND MAINTENANCE IMPLEMENTATIONS OF WELFARE FACILITIES IN IRAQ’S CONSTRUCTION INDUSTRY

2021 ◽  
Vol 33 (2) ◽  
Author(s):  
Zaid Mohammed Hatem ◽  
Abdul Rahim Abdul Hamid ◽  
Ogundipe Kunle Elizah ◽  
Abdulrahman Zahid ◽  
Ahmed Allawi ◽  
...  
Keyword(s):  
Construction Industry ◽  
Questionnaire Survey ◽  
Construction Project ◽  
Health And Safety ◽  
Work Force ◽  
Work Conditions ◽  
Quantitative Methodology ◽  
Construction Sites ◽  
Safety And Health ◽  
Safe Work

The Iraqi construction industry has many problems, especially when it comes in terms of coordinating and managing welfare facilities for the construction project. Proper managing and regular maintenance of welfare facilities is a task divided between official parties in charge of safety and health, mostly the contractors, clients, managers, and work-force. The need for safe work conditions that seem very much lacking in the Iraqi construction sites. This research examines how effectively management is mainly conducted within construction welfare facilities in Iraq’s construction industry. Using a quantitative methodology for collecting and analyzing data in consdreation of the listed objectives, A questionnaire survey was administered to experienced engineers (58) that are involved in the construction industry for investigating the keys causative in management and maintenance aspects. The data was analyzed and interprented using SPSS-12. Most of the analyzed results were classified as important and very important, but some awareness was missing related to planning and inspection. Finally, the interpretation illustrated that the awareness of management and maintenance of welfare facilities are in need to be more studied within the scope of worker’s productivity, health, and safety.

Mitigating the Risks of Offsite Manufacturing through the Application of BIM

2014 ◽  
Vol 3 (4) ◽  
pp. 26-35 ◽  
Author(s):  
Arman Hashemi
Keyword(s):  
Construction Industry ◽  
Questionnaire Survey ◽  
Integrated Design ◽  
Current Situation ◽  
Design Changes ◽  
Key Stakeholders ◽  
Housing Industry ◽  
Design And Construction

The Iranian construction industry is facing several problems including low productivity and immense housing scarcity. It is generally believed that industrialisation and offsite manufacturing can increase the productivity of the Iranian housing industry. Yet, one of the major issues of the Iranian construction industry is defective management during design and construction processes which has considerably increased the risks of offsite construction in Iran. BIM could theoretically address these issues thanks to its potential advantages such as improved efficiency, productivity, and quality. As one of the key stakeholders, architects have a major role in the current situation of the Iranian construction industry. A questionnaire survey was conducted in architectural SMEs to study the normal practices of architects during design and construction processes on site. Frequent design changes and defective communication between stakeholders were identified as the major issues. The results reveal that BIM in general and integrated design in particular could effectively address the aforementioned issues mitigating the risks of offsite construction in Iran.

scholarly journals Influence of the Upstream Terrain on the Formation of a Cold Frontal Snowband in Northeast China

2021 ◽  
Author(s):  
Na Li ◽  
Baofeng Jiao ◽  
Lingkun Ran ◽  
Zongting Gao ◽  
Shouting Gao
Keyword(s):  
Gravity Waves ◽  
Northeast China ◽  
Large Scale ◽  
Control Experiment ◽  
Vertical Motion ◽  
Near Surface ◽  
Inertial Instability ◽  
Two Factors ◽  
Negative Effect ◽  
Conditional Instability

AbstractWe investigated the influence of upstream terrain on the formation of a cold frontal snowband in Northeast China. We conducted numerical sensitivity experiments that gradually removed the upstream terrain and compared the results with a control experiment. Our results indicate a clear negative effect of upstream terrain on the formation of snowbands, especially over large-scale terrain. By thoroughly examining the ingredients necessary for snowfall (instability, lifting and moisture), we found that the release of mid-level conditional instability, followed by the release of low-level or near surface instabilities (inertial instability, conditional instability or conditional symmetrical instability), contributed to formation of the snowband in both experiments. The lifting required for the release of these instabilities was mainly a result of frontogenetic forcing and upper gravity waves. However, the snowband in the control experiment developed later and was weaker than that in the experiment without upstream terrain. Two factors contributed to this negative topographic effect: (1) the mountain gravity waves over the upstream terrain, which perturbed the frontogenetic circulation by rapidly changing the vertical motion and therefore did not favor the release of instabilities in the absence of persistent ascending motion; and (2) the decrease in the supply of moisture as a result of blocking of the upstream terrain, which changed both the moisture and instability structures leeward of the mountains. A conceptual model is presented that shows the effects of the instabilities and lifting on the development of cold frontal snowbands in downstream mountains.

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