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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

Abstract

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

Abstract

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 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

Abstract

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

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 Apriyadi, Teddi; Patra, Oviyan; Suryana, Hendy; Nugraha, Evan
Jurnal Impresi Indonesia Vol. 4 No. 10 (2025): Jurnal Impresi Indonesia
Publisher : Riviera Publishing

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

Abstract

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

Abstract

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.
Pengaruh Kompetensi Karyawan Dan Teknologi Bim Terhadap Kerja Sama Tim Serta Dampaknya Terhadap Produktivitas Kinerja Karyawan Rohmat, Agus; Nugraha, Evan; Patra, Oviyan; Suryana , Hendy
Syntax Literate Jurnal Ilmiah Indonesia
Publisher : Syntax Corporation

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36418/syntax-literate.v10i8.61296

Abstract

Penelitian ini bertujuan untuk menganalisis pengaruh kompetensi karyawan dan teknologi Building Information Modeling (BIM) terhadap kerja sama tim serta dampaknya terhadap produktivitas kinerja karyawan proyek konstruksi. Penelitian dilakukan pada Proyek Bangunan 13 Tahap 2 PT Medion dengan melibatkan 100 responden dari tim proyek. Pendekatan yang digunakan adalah kuantitatif asosiatif, dengan metode survei menggunakan kuesioner dan analisis data melalui Structural Equation Modeling berbasis Partial Least Squares (SEM-PLS) menggunakan SmartPLS 4. Hasil menunjukkan bahwa kompetensi karyawan berpengaruh positif dan signifikan terhadap kerja sama tim (β = 0,396; p < 0,001) dan produktivitas (β = 0,206; p = 0,008). Teknologi BIM juga berpengaruh positif dan signifikan terhadap kerja sama tim (β = 0,453; p < 0,001) dan produktivitas (β = 0,439; p < 0,001). Kerja sama tim berpengaruh signifikan terhadap produktivitas (β = 0,399; p < 0,001) dan berperan sebagai variabel mediasi. Model penelitian menunjukkan nilai R² sebesar 0,596 untuk kerja sama tim dan 0,881 untuk produktivitas, serta nilai Q² masing-masing sebesar 0,479 dan 0,812, dengan SRMR sebesar 0,051 yang mengindikasikan model fit yang baik. Temuan ini diperkuat oleh data lapangan yang menunjukkan peningkatan kualitas, ketepatan waktu, dan kolaborasi tim proyek. Penelitian ini menyimpulkan bahwa kompetensi SDM dan pemanfaatan teknologi BIM secara kolaboratif berperan penting dalam meningkatkan produktivitas kinerja proyek konstruksi.
Analisis Faktor Manajemen Proyek dan Dinamika Pasar Dalam Memprediksi Kesuksesan Proyek di PT. TGE (Studi Kasus di Divisi Non Core Field Services Turbo Machinary) Riyanto, Waris; Nugraha, Evan; Patra, Oviyan; Suryana, Hendy
Jurnal Impresi Indonesia Vol. 5 No. 1 (2026): Jurnal Impresi Indonesia
Publisher : Riviera Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58344/jii.v5i1.7406

Abstract

Persaingan bisnis yang semakin ketat dan target market yang meningkat membuat  perusahaan untuk selalu berinovasi dalam kegiatan bisnisnya. Salah satu inovasi yang sering dilakukan perusahaan adalah melakukan ekspansi ke bidang lain yang bukan merupakan bisnis utamanya. Dalam menjalankan bisnis barunya terutama yang berupa proyek, membuat perusahaan harus mengoptimalkan management project untuk diimplementasikan dalam berbagai aspek proyek. Memperhatikan pentingnya implementasi pengetahuan manajemen proyek terhadap kesuksesan proyek, dan meningkatkan target market yang lebih luas, sehingga penulis melakukan penelitian yang bertujuan untuk mengetahui aspek pengetahuan manajemen proyek yang berpengaruh terhadap kesuksesan proyek non-core terhadap perkembangan market  perusahaan. Sebagai studi kasus, penulis mengamati unit Divisi Field Services Di PT. Torishima Guna Engineering (PT. TGE) yang berinisiatif mengambil proyek yang bersifat non-core yakni konstruksi dalam rentang waktu 2021-2024. Jabatan struktural yang berfungsi sebagai Project Management Office (PMO) sendiri baru dialokasikan pada tahun 2021 di unit tersebut. Model penelitian ini berdasarkan pada framework Project Management Body of Knowledge (PMBOK) yang dikeluarkan oleh PMI. Dalam penelitian ini analisis data dilakukan menggunakan metode Partial Least Square - Structural Equation Modeling (SmartPLS) dan Importance-Performance Analysis (IPA). Data yang digunakan dalam penelitian adalah aspek pengetahuan manajemen proyek sebagai variabel bebas (Variabel Independen), kesuksesan proyek sebagai variabel terikat (Variabel Dependen) dan perkembangan market sebagai variable terikat. Hasil analisis SmartPLS dan IPA menunjukkan bahwa aspek pengetahuan manajemen proyek secara komprehensif memiliki korelasi positif terhadap kesuksesan proyek yang bersifat non-core pada perusahaan. Posisi masing-masing aspek pengetahuan manajemen proyek dalam kuadran IPA memberikan pemahaman di level manajerial untuk menentukan prioritas pengelolaan sumber daya.
Increasing The Competitive Advantage of PT. XYZ Through Product Differentiation For HVAC Chiller (HRS) Systems Pane, Amnas Ridho; Patra, Oviyan; Nugraha, Evan; Suryana , Hendy
Eduvest - Journal of Universal Studies Vol. 6 No. 1 (2026): Eduvest - Journal of Universal Studies
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/eduvest.v6i1.51977

Abstract

This document discusses the product differentiation strategy implemented by PT. XYZ to increase competitive advantage in the HVAC industry, especially chiller systems with Heat Recovery System (HRS). In the context of fierce competition, companies need to understand customer needs and create products that offer unique added value. This study uses quantitative methods to analyze important variables in attracting and retaining customers. The results show that focusing on product differentiation and service improvement can increase customer loyalty and, ultimately, sales volume. This research is expected to make a theoretical and practical contribution to the development of effective marketing strategies in the refrigeration industry.
Improving the Performance of the Army Planning and Budget Staff at the Army Headquarters Through the Implementation of a Planning Information System Patra, Oviyan; Chrisma, Laurensius; Nugraha, Evan; Suryana , Hendy
Eduvest - Journal of Universal Studies Vol. 6 No. 1 (2026): Eduvest - Journal of Universal Studies
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/eduvest.v6i1.51981

Abstract

This study aims to analyze the relationship between technology, organization, and human resources variables and the effectiveness of the Planning Information System (SISFOREN) usage at the Army Headquarters (MABESAD), assess the impact of SISFOREN effectiveness on the performance of the planning department, and identify obstacles faced during implementation. A quantitative approach using the Technology Acceptance Model (TAM) was employed, with data collected through structured surveys distributed to planning and budgeting staff members. The findings reveal that technology does not significantly influence effectiveness (), attributed to implementation challenges and users' limited technical understanding. In contrast, organization positively impacts effectiveness (), highlighting the importance of structured communication and organizational support. Human resources also significantly affect effectiveness (), emphasizing the critical need for comprehensive training programs. Furthermore, the effectiveness of SISFOREN significantly enhances planning performance (), demonstrating improvements in data monitoring, decision-making speed, and administrative efficiency. However, obstacles such as inadequate technology integration, user skill gaps, and unsupportive organizational structures persist. The study contributes to understanding information system implementation in military contexts and provides practical recommendations for optimizing SISFOREN's deployment. Addressing these identified issues is essential for maximizing SISFOREN's implementation success and improving its overall efficiency in supporting the Indonesian Army's planning and budgeting operations.