Analysis productivity and its impact on time and cost of implementation of the private residence project structure work

The construction project of Mrs. Tiya & Mr. Tom's Private Residence in Kemenuh-Gianyar is a 3-story villa development chosen as a case study due to discrepancies between the consultant's plans and the actual field conditions. This necessitated a method to optimize work completion. One proposed solution for accelerating the project was to add more workers. Based on the initial plan, the project required 104 days (3 months and 2 weeks) for completion, with a total structural work cost of Rp. 703,803,162.24. After analysis with the alternative of adding more workers, the project completion duration could return to the schedule of 90 days (3 months) or be accelerated by 12 days (2 weeks), with a total cost of Rp. 671,298,258.93. This concludes that adding more workers is an effective method to increase time efficiency by 14.29% and decrease costs by 4.6%, or the equivalent of Rp. 32,504,903.31

Fuzzy risk analysis for field condition, external, and technical risk factors in Subsea Pipeline Construction Projects to improve contingency cost accuracy

This study focuses on identifying the relationship between risk factors related to environmental conditions, external factors, and technical aspects that affect the cost performance of underwater pipeline construction projects. The main objectives of this study are to understand the qualitative risk assessment that affects the contingency cost performance of underwater pipeline construction projects, and to identify the relationship between various risk factors. The methodology in this study involves a case study approach on a submarine pipeline project in the Java Sea, utilizing historical analysis and expert information to identify potential risks and their impacts on project costs using fuzzy-based qualitative and quantitative analysis. The study found two field condition risk factors, one external risk and thirteen technical risk factors in a submarine pipeline construction project using the S-Lay method. In an academic context, this study conducts an in-depth and detailed analysis of the identification stage, analysis, classification of risk levels (field conditions, external and technical), relationships between risk variables, corrective actions, corrective action costs, and contingency cost analysis. The results of the analysis help in estimating project costs in more detail

Combining hydraulic roughness measurement results with Manning's roughness coefficient in drainage channels: A case study of drainage channels in Denpasar City, Bali Province

To measure its reliability, the quality of work and materials should be assessed using objective tools and methods. For example, concrete quality is measured using tools and methods of compression testing or a hammer test tool; the results are expressed in terms of characteristic compressive strength (f'c). Steel quality is determined by the tensile test method, and the quality or strength is expressed in tensile strength (fy). The quality of the highway surface is determined by the roughness test method using the NAASRA roughness meter and the results are expressed with good, moderate and poor criteria, correlated with the International Roughness Index (IRI) value, namely good roughness if the IRI value is <75 inches/mile, moderate for IRI values between 70-170 inches/mile and poor IRI > 170 inches/mile. The hydraulic quality of the drainage channel surface to date cannot be determined with objective tools and methods. Similar to the quality of the road surface, the hydraulic quality of the channel is also determined based on the criteria: good, moderate/normal, and poor, correlated with the Manning roughness coefficient; the difference is that there is no objective value for the good, moderate, and poor criteria.

Development of information systems on the integration of EDGE certification, BIM and WBS implementation in operational and maintenance work of flats in DKI Jakarta Province to increase effectiveness and efficiency of time and cost

The construction of flats is one of the efforts of the DKI Jakarta Government to provide decent housing as mandated in Law No. 20 of 2011 and to address the housing backlog in DKI Jakarta Province. Limited land availability means that house construction must be carried out vertically with complexity in its operation and maintenance. This study aims to improve the effectiveness and efficiency of time and costs in the operational and maintenance work of flats in DKI Jakarta Province through the development of an information system for the application of EDGE Certification, BIM, and WBS integration. The methodology used is a questionnaire and interviews involving many experts, namely EDGE Experts and BIM Experts, and related respondents. The results of the study prove that the Development of an Information System for the Integration of the Application of EDGE Certification, BIM, and WBS in the Operational and Maintenance Work of Flats in DKI Jakarta Province can improve the effectiveness and efficiency of time and costs with a linear equation Y = 1.208 + 0.089 X1 + 0.322 X2 + 0.499 X3 – 0.161 X4

Ergonomics risk factors analysis of building construction work in SARBAGITA Region Bali Indonesia

The main objective of this research is to analyze Ergonomics Risk Factors and MSDs Rate in building construction work in the SARBAGITA area of Bali, Indonesia. SARBAGITA, an acronym for Denpasar, Badung, Gianyar, and Tabanan, is the largest metropolitan area in the Nusa Tenggara Islands and the second largest in the Eastern Indonesia Region after the metropolitan city of Mamminasata in South Sulawesi. Therefore, various infrastructure facilities have been developed, including office buildings, hotels, and other public facilities. The development of infrastructure in the SARBAGITA can be seen through the number of active construction companies. In 2020, the number of active construction companies was 987, decreased slightly during the COVID-19 pandemic in 2021 to 883, and rose again to 997 in 2022. If each company has at least one construction project, then the number of active projects in 2022 was 997. Construction work is very complex, especially in building construction. Involving a large number of workers with varied backgrounds, most of the work is carried out outdoors, using a variety of heavy-duty equipment, and involving hazardous materials. Construction work has a high risk of accidents and work-related diseases from aspects of biology, physics, chemistry, ergonomics, and even psychology.&nbsp

Integration of ergonomic principles in the design and construction of car wheel polishing tools to improve operator performance

The use of manual tools in the process of polishing car wheels is still widely found in variety workshops, which has an impact on low work efficiency and high physical load of operators. This research aims to design and build ergonomics-based car wheel polishing tools to improve operator efficiency and work comfort. The method used is design and construction with an ergonomic approach, starting from identifying user needs, collecting anthropometric data, to testing the functional of the tool. The design of the tool was adjusted to the anthropometric data of 10 workshop operator respondents, resulting in a tool with dimensions of 100 cm × 70 cm × 120 cm. The evaluation was carried out by comparing the polishing performance manually and using tools in terms of working time, fatigue level (Borg CR-10), and work posture (RULA). The results showed that the average polishing time decreased from 65 minutes (manual) to 12.3 minutes (using tools), with a time efficiency of 80.8%. The fatigue score decreased from 7.6 to 2.9, and the RULA score showed a decrease in ergonomic risk from high to moderate-low. The paired t-test showed a statistically significant difference (p < 0.05) across the parameters tested.&nbsp

Analysis of SMK3 implementation on building construction project implementation performance: Case study of the construction of the Menara Mandiri building in Denpasar

The construction industry is inherently associated with a high risk of occupational accidents. A major contributing factor to such incidents is the inadequate implementation of Occupational Safety and Health (OSH) practices. To mitigate these risks, the professional application of the Occupational Safety and Health Management System (OSHMS) is crucial and should comply with relevant laws and government regulations. This study aims to assess the level of OSHMS implementation in the construction of the Menara Mandiri Building in Denpasar and to identify key factors influencing its application. A qualitative descriptive method was employed, with data collected through the use of checklists and questionnaires. The data were analyzed using percentage analysis to determine the implementation level, descriptive statistics (mean values), and ranking analysis to identify influential factors. The findings indicate that the OSHMS implementation level was satisfactory, with a compliance rate of 96.39% and a minor non-compliance rate of 3.61%. The most significant factor influencing the implementation of OSHMS was the availability of occupational safety and health training for workers

Development of risk-based BIM integrated material resource control procedures to improve time performance on public facility construction projects in the Seribu Islands

This study aims to develop a material resource control procedure from a contractor's perspective that is integrated with 4D and 5D Building Information Modeling (BIM) technology, based on dominant risks at each stage, to improve project time performance. The research approach includes the identification and analysis of dominant risks, integration of activities with BIM, and data processing using the Delphi method and statistical analysis with SPSS version 27. The results of the study showed seven improvements to existing activities and the addition of nine new activities at the stages of shipping, receiving, storing, distributing, and using materials. Of all these activities, twelve can be integrated with BIM technology according to the results of risk validation. To ensure the feasibility of implementation, the developed procedure was tested through a case study on the Public Facility Construction (PFU) project in Gusung Klanceng. The results of the case study showed that the integrated BIM risk-based procedure was able to improve the accuracy of material requirement estimates and control project schedule changes, thereby supporting the achievement of time targets more optimally

Evaluation of project implementation control in pre-construction stage to improve service provider performance in government procurement of goods and services

This study aims to determine what evaluation activity factors have an impact on the performance of service providers based on Circular Letter No. 18/SE/M/2021 which is carried out on the type of tender/auction with a single-file evaluation method for the kind of procurement of goods/services that uses the lowest price evaluation method of the post-qualification knockout system on projects with a unit price system. This study found that all independent variables, namely arithmetic corrections, conflicts of interest and indications of collusion, administration, qualifications, technical, price and specifications, design and changes, impact the performance of service providers, which are dependent variables. Technical evaluation activities and qualification evaluations have a dominant influence among other variables on the performance of service providers. This research produces modeling and improvements to improve the performance of service providers in the pre-construction stage, which is expected to minimize problems during the project

Analysis of cantilever beam reinforcement methods and costs in the Wonderland Uluwatu Project

A strong and durable structure is the expectation for every building. However, in the implementation of concrete manufacturing projects, there are still many issues due to the quality of concrete not meeting the plan specifications, resulting in an inability to withstand the working load. For example, in the building construction project at Wonderland Uluwatu, the planned concrete quality for the cantilever beam was K300. However, when the hammer test was conducted at 28 days of curing, the expected quality was not achieved. So, a cantilever beam is necessary to repair and strengthen the concrete structure of the building to ensure its safety. This research compares the reinforcement methods for cantilever beams in terms of cost. Two cantilever beam reinforcement methods will be implemented: first, steel jacketing reinforcement using 8 mm and 10 mm thick steel plates; second, IWF steel reinforcement with dimensions of 500 mm x 200 mm x 10 mm x 16 mm. These reinforcement methods will be evaluated through deflection analysis and deviation analysis. The results of this study indicate that the cost of the steel jacketing reinforcement method with thicknesses of 8 mm and 10 mm amounts to Rp. 345,086,768.00.&nbsp