Garuda - Garba Rujukan Digital

Analysis of Effectiveness Lot Sizing Based on Design of Experiment Nugraha, Evan; Puspawardhani, Gianti; Norina, Rida
Community Engagement and Emergence Journal (CEEJ) Vol. 6 No. 3 (2025): Community Engagement & Emergence Journal (CEEJ)
Publisher : Yayasan Riset dan Pengembangan Intelektual

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37385/ceej.v6i3.8647

Lot sizing techniques have been widely analyzed by experts, because ordering costs, storage costs, and lot sizes have a significant impact on the total cost of ordering. This study uses lot sizing techniques including Wagner-Whitin algorithm, Silver-Meal algorithm, Least Unit Cost, Least Total Cost, Part Period Balancing, Period Order Quantity, Groff algorithm, and Lot for Lot. The data used is taken from a chemical raw material procurement company, including ordering and storage costs. The initial analysis concluded that the Silver-Meal algorithm and the Groff algorithm have relative biases that are close to the Wagner-Whitin algorithm. The second analysis concluded that for the lot sizing technique, the calculated F value (84.3) was greater than the F table value (2.1), indicating a significant effect of the lot sizing technique on the relative bias percentage. Furthermore, the demand analysis shows that the calculated F value (80.0) is greater than the F table value (2.6), indicating a significant influence of the demand on the percentage relative bias

Implementasi Project Quality Management dan Perancangan Proses Bisnis Pada Milestone First Years Inspection dan di Proyek Konstruksi di PT PLN Nusantara Power Batubara, Nasep Nirwan; Nugraha, Evan; Suryana, Hendy; Patra, Oviyan
Jurnal Pendidikan Indonesia Vol. 6 No. 8 (2025): Jurnal Pendidikan Indonesia
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/japendi.v6i8.8497

This study aims to evaluate the implementation of Project Quality Management (PQM) in the First Year Inspection (FYI) milestone of the Muara Tawar Add-On Combined Cycle Power Plant (PLTGU) Block 2 project, and to design an integrated business process using the lean construction approach. A mixed-methods research design was applied, combining observation, in-depth interviews, and document analysis. The findings reveal that the PQM implementation, based on PMBOK 7 principles—namely Quality Planning, Quality Assurance, and Quality Control—was mostly at a “partial fit” level due to non-standardized documentation and delays in corrective actions. The FYI business process was mapped using Value Stream Mapping (VSM) and Big Picture Mapping (BPM) to classify value-added (VA), non-value-added (NVA), and necessary non-value-added (NNVA) activities. Of the 23 total activities analyzed, 14 were identified as value-added, while 2 were classified as wasteful. The main causes of inefficiency included waiting time, unnecessary inventory, and excessive transportation. These were mitigated through the integration of collaborative spreadsheets and improved stakeholder coordination. The study emphasizes the importance of having a single source of truth in defect monitoring among project stakeholders (owner, contractor, consultant) to enable better communication and decision-making. Results demonstrate that the resolution of FYI pending items was completed earlier than the planned schedule, validating the effectiveness of integrating lean construction tools to enhance PQM outcomes in power plant construction projects.

ANALYSIS OF THE EFFECTIVENESS OF DEMAND DATA PATTERNS AND LOTTING TECHNIQUES BASED ON EXPERIMENTAL DESIGN Nugraha, Evan; Sari, Rini Mulyani
Indonesian Interdisciplinary Journal of Sharia Economics (IIJSE) Vol 8 No 3 (2025): Sharia Economics
Publisher : Sharia Economics Department Universitas KH. Abdul Chalim, Mojokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31538/iijse.v8i3.7351

Lot sizing technique is a method of determining the size of a lot in a procurement process. Lot sizing technique has been extensively analyzed by experts, as ordering costs, holding costs, and lot sizes have a significant impact on the total ordering cost. One of the many lot sizing techniques is the Groff algorithm, which is rarely used. Other lot sizing techniques include the Wagner-Whitin algorithm, Silver-Meal algorithm, Least Unit Cost, Least Total Cost, Part Period Balancing, Period Order Quantity, and Lot for Lot. Simulation data was collected from a real company, including ordering and holding costs, and demand data was generated with four different demand patterns: increasing, decreasing, random, and stationary. The initial analysis concludes that the Silver-Meal algorithm and Groff algorithm have relative biases that are close to the Wagner-Whitin algorithm. The second analysis concludes that for lot sizing techniques, the calculated F-value (84.3) is larger than the table F-value (2,1), indicating a significant influence of lot sizing techniques on the relative bias percentage. Furthermore, the analysis of demand patterns shows that the calculated F-value (80.0) is larger than the table F-value (2,6), indicating a significant influence of demand patterns on the relative bias percentage.

Analysis of Product Quality and Brand Image in Driving Repurchase Intention for Luta Dehumidifier Products at PT. Dwi Mitra Teknindo Maulana, Ade; Patra, Oviyan; Nugraha, Evan; Suryana, Hendy; Putra, Adi Ganda
Journal of Social Research Vol. 4 No. 10 (2025): Journal of Social Research
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/josr.v4i9.2778

This study aims to analyze the influence of product quality and brand image on repurchase intention of LUTA dehumidifier products distributed by PT. Dwi Mitra Teknindo. The research background is based on the increasing demand for dehumidifiers in Indonesia after the Covid-19 pandemic, along with the challenges faced by the LUTA brand in building a positive image amid consumer perceptions of Chinese-made products. This study employed a quantitative approach with a descriptive-causal research design. Data were collected through surveys of LUTA consumers in several major cities in Indonesia and analyzed using Structural Equation Modeling (SEM) to examine both direct and indirect relationships among the variables. The findings indicate that product quality has a positive and significant effect on repurchase intention, both directly and through brand image as a mediating variable. Brand image also plays a crucial role in strengthening consumer loyalty towards LUTA products. These results highlight the importance of improving product quality and enhancing brand image as strategic efforts to retain existing customers and support sustainable business growth.

Analysis of Delay Factors in EPC Power Plant Projects (Case Study: PLTMG Project in Sumbawa) Gunawan, Maulana Indra; Suryana, Hendy; Patra, Oviyan; Nugraha, Evan
Journal Research of Social Science, Economics, and Management Vol. 5 No. 2 (2025): Journal Research of Social Science, Economics, and Management
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/jrssem.v5i2.1013

Construction projects often face the risk of delays, which can affect cost, quality, and schedule performance. This research aims to analyze the factors causing delays in the Engineering, Procurement, and Construction (EPC) Gas Engine Power Plant (PLTMG) project in Sumbawa and to formulate improvement recommendations. The research employs the Partial Least Squares – Structural Equation Modeling (PLS-SEM) method with 67 respondents consisting of the project owner, contractor, and supervision consultant. The research variables include design, financial, resources, contractor, material, external, and owner as independent variables and time overrun as the dependent variable. The results show that the external factor has a positive and significant influence on project delays (? = 0.534; p = 0.000), which includes regulatory changes, extreme weather, permit delays, and socio-cultural influences. The owner factor shows a nearly significant effect (p = 0.092), while design, financial, contractor, material, and resource factors have no significant impact. The research model demonstrates good predictive capability (R² = 0.696; Q² = 0.516). Improvement recommendations focus on mitigating external factors, including establishing a legal team to monitor regulations, developing a flexible work schedule adapted to weather conditions, expediting permits through a dedicated liaison officer, and enhancing communication with the local community. These findings are expected to serve as a reference for stakeholders in managing delay risks in similar construction projects.

Implementation Of The Scor Digital Standard Method In The Cijurey Dam Package 1 Project Apriyadi, Teddi; Patra, Oviyan; Suryana, Hendy; Nugraha, Evan
Journal Research of Social Science, Economics, and Management Vol. 5 No. 3 (2025): Journal Research of Social Science, Economics, and Management
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/jrssem.v5i3.1084

Abstract Dam construction projects face various challenges in supply chain management that can affect the success of the project. This study aims to analyze the implementation of the SCOR Digital Standard (DS) method in improving supply chain performance in the Cijurey Dam Package 1 Project. The research method uses qualitative and quantitative approaches by implementing SCOR Racetrack including the Engage, Define, Analyze, Plan, and Launch stages. The results showed that the baseline performance of RL.2.6 Delivery Performance to Commit Date only reached 73.33% of the target of 90%, Inventory Turnover (ITO) <1.1 times/year of the target ?2 times/year, and Days of Inventory (DOI) reached ±250 days exceeding the maximum target of 180 days. The root of the problem is identified through the 5 Why Analysis and Fishbone Diagram, namely the absence of consignment inventory and regular reconciliation meetings with vendors. The recommended improvement strategies include four improvement projects: Procurement Terms & Conditions Review, Freight Carrier Delivery Performance Evaluation, Regular Reconciliation Meetings, and Consignment Inventory. The implementation of this strategy is projected to increase RL.2.6 to ?90%, reduce the DOI to ?180 days, increase ITO to ?2 times/year, with financial benefits reaching Rp1.29 billion per year.

Implementasi Metode Scor Digital Standard di Proyek Bendungan Cijurey Paket 1 Teddi Apriyadi; Patra, Oviyan; Suryana, Hendy; Nugraha, Evan
Jurnal Impresi Indonesia Vol. 4 No. 10 (2025): Indonesian Impression Journal (JII)
Publisher : Riviera Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58344/jii.v4i10.7022

Pembangunan bendungan merupakan proyek infrastruktur strategis yang memiliki manfaat besar bagi pengendalian banjir, penyediaan air baku, irigasi, serta energi listrik. Namun, proyek konstruksi bendungan memiliki tingkat kompleksitas tinggi dan rentan terhadap berbagai risiko rantai pasok, seperti keterlambatan pengiriman material, fluktuasi harga, kualitas material yang tidak sesuai, serta kendala komunikasi dan logistik. Penelitian ini bertujuan untuk menganalisis dan meningkatkan kinerja rantai pasok pada Proyek Bendungan Cijurey Paket 1 melalui implementasi metode Supply Chain Operations Reference (SCOR) Digital Standard. Pendekatan yang digunakan adalah metode campuran (mixed methods) dengan analisis kuantitatif untuk mengukur kinerja rantai pasok pada indikator RL.2.6, RL.3.15, RL.3.16, Inventory Turnover (ITO), dan Days of Inventory (DOI), serta analisis kualitatif untuk mengidentifikasi akar penyebab permasalahan menggunakan metode 5 Why dan Fishbone Diagram. Hasil evaluasi awal menunjukkan bahwa skor komposit kinerja rantai pasok berada pada tingkat 62,4% atau kategori “cukup”, dengan kelemahan utama pada aspek keandalan pengiriman dan biaya rantai pasok. Melalui rancangan strategi perbaikan berbasis SCOR Racetrack, House of Risk (HOR), serta simulasi Monte Carlo, penelitian ini menyajikan rekomendasi mitigasi risiko yang dapat meningkatkan keandalan, efisiensi, dan efektivitas rantai pasok proyek. Kontribusi penelitian ini tidak hanya memperluas penerapan SCOR DS dalam konteks proyek konstruksi, tetapi juga memberikan panduan praktis bagi manajer proyek dan pemangku kepentingan dalam mengelola risiko rantai pasok pada proyek infrastruktur skala besar.

UPAYA MENINGKATKAN MOTIVASI BELAJAR SEJARAH SISWA KELAS XII IPS 4 SMAN 3 TANGERANG MENGGUNAKAN METODE PEMBELAJARAN KOOPERATIF TIPE TEAM GAMES TOURNAMENT Nugraha, Evan; Martini, Sri; Santosa, Firdaus Hadi
PERIODE: Jurnal Sejarah dan Pendidikan Sejarah Vol. 7 No. 1 (2025): PERIODE : Jurnal Sejarah dan Pendidikan Sejarah
Publisher : Program Studi Pendidikan Sejarah Fakultas Ilmu Sosial dan Hukum Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/periode.071.1

This research aims to enhance the learning motivation of students in class XII IPS 4 at SMA Negeri 3 Tangerang through the cooperative learning method of team games tournament. The background is the low participation and motivation of students in history learning, evident from their low grades and the lack of student involvement in the learning process. This research uses the Classroom Action Research (CAR) model, which consists of four stages: planning, implementation, observation, and reflection. In Cycle I, the cooperative learning method of team games tournament was applied to the topic: Conflicts in Various Parts of the World, with a sub-topic on conflicts occurring in Europe. The results showed that student learning motivation increased to a moderate category, 40.93%. After reflection and improvement, Cycle II focused on the sub-topic of Conflicts in the Middle East, and the results showed an increase in motivation to a high category, 67.52%. The team games tournament cooperative learning method is effective in enhancing students' motivation to learn history, as evidenced by the increase in student activity, self-confidence, and student involvement in the learning process. Abstract : Penelitian ini bertujuan untuk meningkatkan motivasi belajar sejarah siswa kelas XII IPS 4 di SMA Negeri 3 Tangerang melalui metode pembelajaran kooperatif tipe team games tournament. Latar belakangnya adalah rendahnya partisipasi dan motivasi siswa dalam pembelajaran sejarah, terlihat dari perolehan nilai yang rendah serta kurangnya partisipasi siswa dalam proses pembelajaran. Penelitian ini menggunakan model Penelitian Tindakan Kelas (PTK) yang terdiri dari empat tahap: perencanaan, pelaksanaan, pengamatan, dan refleksi. Pada Siklus I, metode pembelajaran kooperatif tipe team games tournament diterapkan pada topik : Konflik di Berbagai Belahan Dunia dengan sub-bahasan konflik yang terjadi di Eropa, hasilnya menunjukkan motivasi belajar siswa naik menjadi kategori sedang, 40,93%. Setelah refleksi dan perbaikan, Siklus II difokuskan pada sub-bahasan Konflik di Timur-Tengah, hasilnya menunjukkan peningkatan motivasi menjadi kategori tinggi, 67,52%. Metode pembelajaran kooperatif tipe team games tournament efektif dalam meningkatkan motivasi belajar sejarah siswa, terlihat dari peningkatan aktivitas siswa, kepercayaan diri, keterlibatan siswa dalam proses pembelajaran.

Implementasi Project Quality Management dan Perancangan Proses Bisnis Pada Milestone First Years Inspection dan di Proyek Konstruksi di PT PLN Nusantara Power Batubara, Nasep Nirwan; Nugraha, Evan; Suryana, Hendy; Patra, Oviyan
Jurnal Pendidikan Indonesia Vol. 6 No. 8 (2025): Jurnal Pendidikan Indonesia
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/japendi.v6i8.8497

This study aims to evaluate the implementation of Project Quality Management (PQM) in the First Year Inspection (FYI) milestone of the Muara Tawar Add-On Combined Cycle Power Plant (PLTGU) Block 2 project, and to design an integrated business process using the lean construction approach. A mixed-methods research design was applied, combining observation, in-depth interviews, and document analysis. The findings reveal that the PQM implementation, based on PMBOK 7 principles—namely Quality Planning, Quality Assurance, and Quality Control—was mostly at a “partial fit” level due to non-standardized documentation and delays in corrective actions. The FYI business process was mapped using Value Stream Mapping (VSM) and Big Picture Mapping (BPM) to classify value-added (VA), non-value-added (NVA), and necessary non-value-added (NNVA) activities. Of the 23 total activities analyzed, 14 were identified as value-added, while 2 were classified as wasteful. The main causes of inefficiency included waiting time, unnecessary inventory, and excessive transportation. These were mitigated through the integration of collaborative spreadsheets and improved stakeholder coordination. The study emphasizes the importance of having a single source of truth in defect monitoring among project stakeholders (owner, contractor, consultant) to enable better communication and decision-making. Results demonstrate that the resolution of FYI pending items was completed earlier than the planned schedule, validating the effectiveness of integrating lean construction tools to enhance PQM outcomes in power plant construction projects.

The Effect of Project Management Performance on Machine Operational Readiness at PT GPE (Medion Group) Nugraha, Evan; Rukmana, Dodi; Patra, Oviyan; Suryana, Hendy
Journal of Social Research Vol. 4 No. 9 (2025): Journal of Social Research
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/josr.v4i8.2733

This research aims to analyze the influence of project management on machine operational readiness at PT Gallaria Prospera Eterna (PT GPE). Five variables were examined: integration management, time management, cost management, quality management, and resource management. Previous issues, such as project delays and cost overruns, prompted the need for an evaluation of the project management system. A quantitative method was employed, utilizing the Partial Least Squares Structural Equation Modeling (PLS-SEM) approach. The results indicated that integration management (? = 0.245), time management (? = 0.235), and resource management (? = 0.232) had a significant effect on machine operational readiness. Time and resource management also exhibited positive quadratic effects (QE = 0.170 and QE = 0.181), while cost management had a negative quadratic effect (QE = –0.309). Quality management was found to be statistically insignificant. The R² value of 0.689 and Q² value of 0.567 indicate that the model has strong explanatory and predictive power. The implementation of strategies based on these findings—such as establishing a Project Management Office (PMO), digitalizing project tracking, and strengthening human resources—has successfully improved the execution of the second-phase fermenter machine procurement project, delivering it on time, within budget, and fully operational.

Title

Found 21 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 21 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 21 Documents
Search