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Analysis of Potential Influence of Design, Procurement and Implementation Management Models on Cost Ineeficiency due to Building Construction Waste Materials Based on SEM Analysist James Thoengsal
Budapest International Research and Critics Institute-Journal (BIRCI-Journal) Vol 5, No 3 (2022): Budapest International Research and Critics Institute August
Publisher : Budapest International Research and Critics University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33258/birci.v5i3.5957

Abstract

The emergence of residual materials during the building construction process cannot be avoided by the construction operator, especially the impact that directly or indirectly results in wasting construction material costs. However, this can be minimized by applying an ideal waste material management concept from the planning, procurement to implementation stages. The purpose of this study is to analyze the level of potential impact of the application of the concept of waste management of building construction materials in an effort to reduce the impact of inefficiency in project material costs, where in this study is viewed from the point of view of the parties involved in the project carried out by the State Owned Contractor (SOE). The method used in this research is done by distributing questionnaires to the building construction organizers which are being handled by the SOE contractors, where the respondents consist of experienced and responsible parties in project activities. So the conclusion from the results of this study shows that the concept of the model provides an impact test value that is quite ideal and has the potential to be applied by construction operators, both contractors, planning consultants and material suppliers in an effort to reduce the impact of cost inefficiency due to the emergence of residual building construction materials in Indonesia in the future.
Ideal Factor Analysis of Implementation Management Due to Waste Material of Building Construction Materials on Contractor Projects In Indonesia James Thoengsal; Miswar Tumpu
Eduvest - Journal of Universal Studies Vol. 2 No. 6 (2022): Journal Eduvest - Journal of Universal Studies
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2547.863 KB) | DOI: 10.59188/eduvest.v2i6.451

Abstract

The implementation of building construction projects cannot be separated from the problem of wasting costs, which is one of the contributing factors due to the emergence of residual materials during the construction process. The purpose of this study is to identify and analyze the ideal indicators in the application of construction material waste management in an effort to reduce the impact of cost inefficiency due to the of waste material so far, which in this study is viewed from the point of view of the parties involved in the building project. The results obtained from this study are that the ideal factor for implementing the ideal construction material waste management. Where at the planning/design stage, the most priority variable category is the Selection of Low Waste Materials, then at the procurement stage, namely the Estimation and Ordering of Material Volume and at the construction stage, namely the category Management Commitment category variables. The direction of research development is in the form of developing the concept of an ideal building construction material waste management model that can be applied by the construction operator, in this case addressed to the contractor, planning consultant and material supplier in an effort to reduce the impact of inefficiency in material costs during the construction process in Indonesia.
Foreman Performance Motivation Factors Analysis in Construction Projects JAMES THOENGSAL; M. Tumpu
Journal of Scientific Research, Education, and Technology (JSRET) Vol. 2 No. 4 (2023): Vol. 2 No.4 2023
Publisher : Kirana Publisher (KNPub)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58526/jsret.v2i4.253

Abstract

Work motivation for workers in a project can be considered simple and can also be a complex problem, because basically humans are easy to motivate by giving what they want. Furthermore, motivation is a process as the first step for someone to take action due to physical and psychological deficiencies or in other words, it is an encouragement shown to fulfill certain goals. If this condition does not occur, it will reduce worker work motivation and will result in decreased worker performance. This research aims to determine the level of needs that influence the motivation of construction foremen and analyze the motivational factors that influence the motivation of construction foremen. The method used by researchers was by distributing questionnaires to 15 foremen who were used as respondents for construction project research in Pangkep, as well as conducting interviews with three or four project foremen. Based on the research results, it was found that 5 factors have the most influence on the motivation of construction project foremen in Pangkep Regency in general, namely: Of the 23 motivation factors, there are 5 factors that have the most influence on the motivation of construction project foremen in general, namely: (1) adequate wages/salaries , (2) good workplace facilities, (3) payment received on time, (4) Good relationships with fellow workers, (5) good work direction program.
Performance Evaluation of High-Strength Self-Compacting Concrete (SCC) with Nickel Slag as Partial Fine Aggregate Replacement Muhammad Syarif; James Thoengsal; Randy Setiawan; Shadiqa Pratama Zulfariadi
Structures, Infrastructure, Planning, Implementation, and Legislation Vol. 2 No. 1 (2026): April,2026
Publisher : CV. Get Press Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69855/sipil.v2i1.531

Abstract

The escalating demand for high-performance construction materials has intensified the search for sustainable alternatives to natural aggregates, particularly in the production of High-Strength Self-Compacting Concrete (SCC). This study evaluates the integration of nickel slag from Morowali, Central Sulawesi, as a partial replacement for fine aggregates to address the environmental degradation caused by river sand mining. Utilizing a quantitative experimental design, 48 cylindrical specimens were tested across various substitution levels (0%, 20%, 40%, and 60%) with a consistent water-to-binder ratio of 0.28 and a target characteristic strength of 60 MPa. Rheological parameters were assessed through slump-flow and L-box blocking ratio ( ) tests, while mechanical performance was measured via compressive strength at 7, 14, and 28 days. Results indicate that a 40% substitution threshold represents the optimum balance, yielding a superior characteristic strength of 69.73 MPa a 16.6% enhancement over the control. Rheologically, nickel slag improved fluidity up to 710 mm, although replacements exceeding 40% triggered dynamic instability and segregation, evidenced by an   ratio decline to 0.78. These findings imply that nickel slag is a technically viable reinforcing filler for strategic infrastructure, provided that substitution levels are strictly calibrated. The study concludes that while nickel slag significantly densifies the concrete matrix, industrial adoption requires further standardization of long-term durability metrics. Future research should prioritize the evaluation of creep and chloride resistance in marine environments to ensure structural longevity.
Analisa Perbandingan Waktu Penjadwalan Proyek Dengan Metode Pert (Project Evaluation And Review Technique) Dan CPM (Critical Path Method) (Studi Kasus : Rs. Type D Camba, Maros) Yudith Helene Mustakim; James Thoengsal; Qarnila Ridahniah Rahman; Muhammad Fadli Saleh; Prasetya Agung Wicaksono
Science and Education Journal (SICEDU) Vol 5 No 3 (2026): Science and Education Journal 2026
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/sicedu.v5i3.1390

Abstract

Analisa Perbandingan Penjadwalan Proyek Dengan Metode PERT (Project Evaluation And Review Technique) Dan CPM (Critical Path Method) Studi Kasus : Rumah Sakit Type D Camba, Maros. Kecamatan Camba berjarak 47 km ke pusat kota dimana terdapat satu-satunya fasilitas kesehatan masyarakat. Pembanguna Gedung Rumah Sakit Type D ini diharapkan dapat membantu masyarakat sekitar yang membutuhkan pelayanan kesehatan yang memadai dan mudah diakses.Penelitian ini bertujuan untuk mengetahui (1) jalur kritis kegiatan pada sebuah proyek dengan metode PERT dan CPM , (2) Mengetahui perbedaan durasi  waktu penyelesaian proyek dengan metode PERT & CPM. Metode yang digunakan dalam penelitian ini yaitu Metode PERT dan CPM, dengan menggunakan data yang diperoleh dari proyek dan menggunakan aplikasi tambahan microsoft project dalam menganalisa penelitian tersebut. Hasil dari penelitian ini menunjukkan bahwa terdapat perbedaan waktu penyelesaian kegiatan yaitu dalam metode PERT waktu yang digunakan untuk menyelesaikan pekerjaannya adalah 18 minggu, dan metode CPM waktu yang digunakan dalam menyelesaikan pekerjaan adalah 16 minggu. Kesimpulan menunjukkan bahwa dalam setiap jenis pekerjaan, ada beberapa aktivitas yang saling terhubung, yang biasanya disebut jalur kritis. Ini memerlukan perhatian khusus agar aktivitas tersebut tidak mengalami hambatan yang bisa mengganggu berjalannya proyek. Dari hasil penelitian, penulis menemukan bahwa metode yang paling tepat untuk diterapkan dalam proyek ini adalah metode CPM.
Occupational Safety Management Barriers on the Usilimo–Karubaga Road Preservation Project in Highland Papua James Thoengsal; Yudith Helene Mustakim; Duberto Sarina
Equivalent: Jurnal Ilmiah Sosial Teknik Vol. 8 No. 5 (2026): Equivalent: Jurnal Ilmiah Sosial Teknik
Publisher : Politeknik Siber Cerdika Internasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59261/jequi.v8i5.465

Abstract

Background: Remote road preservation work combines construction hazards with difficult terrain and limited access, complicating consistent occupational safety management. Objective: To assess reported and observed Sistem Manajemen Keselamatan dan Kesehatan Kerja (SMK3; Occupational Safety and Health Management System) practices against the 166-criterion framework, rank perceived barriers, and formulate project-specific improvements for the Usilimo–Karubaga corridor in Highland Papua. Methods: A descriptive mixed-methods case study combined observation, document review, an 18-item, five-point Likert-scale questionnaire involving 34 personnel, and structured interviews with 30 informants. Item-total correlations, Cronbach’s alpha, descriptive rankings, and an exploratory one-sample t-test were integrated with qualitative evidence. Results: The overall perceived-barrier mean was 2.97, within the moderate interval of 2.61–3.40; it was not a regulatory compliance score. Item-total correlations exceeded 0.339, and Cronbach’s alpha was 0.829. The leading barriers were PPE awareness and formal training (both 3.18), PPE availability (3.15), and vigilance and supervision (both 3.12). The reported t-test did not distinguish the mean from the neutral value of 3.00. Interview accounts linked these obstacles to transportation difficulties, weather, terrain, and uneven supervisory reach. A complete criterion-level audit score was not reported. Conclusion: The evidence supports coordinated PPE reserves, structured training, risk-based supervision, emergency preparedness, and locally adapted safety communication. These case-specific proposals require prospective evaluation; their effectiveness and wider applicability have not been established.
The Influence of Field Supervision on Construction Work Quality: a PLS-SEM Model of the Batupanga Community Health Center Project Yudith Helene Mustakim; James Thoengsal; Hairil Hairil
Jurnal Teknik Indonesia Vol. 5 No. 4 (2026): Jurnal Teknik Indonesia
Publisher : Publica Scientific Solution

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58860/jti.v5i4.996

Abstract

Construction quality depends on effective field supervision, compliance with technical specifications, and timely corrective actions. However, empirical evidence regarding these relationships in healthcare facility construction projects remains limited. This study examined the relationship between field supervision and construction work quality in the Batupanga Community Health Center construction project in Luyo District, Polewali Mandar Regency, Indonesia. A quantitative research approach was employed, involving 15 respondents purposively selected based on their direct involvement in project implementation. Data were collected through questionnaires comprising five indicators for each construct, supplemented by field observations and project documentation. The data were analyzed using partial least squares structural equation modeling (PLS-SEM). Measurement model evaluation indicated acceptable convergent validity and internal consistency reliability, with average variance extracted (AVE) values of 0.582 and 0.512 and composite reliability values of 0.873 and 0.838 for the respective constructs. The structural model revealed a positive and statistically significant association between field supervision and perceived construction work quality (B = 0.512; t = 2.418; p = 0.017). Field supervision explained 26.2% of the variance in perceived construction work quality (R² = 0.262), with an effect size of 0.355 (f²). Inspector accuracy and inspection intensity emerged as prominent indicators of field supervision. These findings underscored the importance of systematic inspections, effective coordination, and documented corrective actions in supporting construction quality. However, the limited explanatory power of the model suggested that additional factors also contributed to variations in perceived work quality. The study concluded that field supervision was positively associated with construction work quality, although the small, purposively selected sample and single-project setting limited the generalizability of the findings. Future research should include larger samples across multiple construction projects and examine additional predictors, including workforce competence, material quality, design clarity, and environmental conditions.