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All Journal Academia Open Journal La Sociale Journal La Multiapp Jurnal Pengbdian Teknik Mesin Golden Ratio of Data in Summary IIJSE Serambi Engineering Limits: Journal of Mathematics and Its Applications
Safirin, Moch. Tutuk
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Optimalisasi Sumber Daya Lokal: Peningkatan Produksi Ikan Lele Melalui Pemanfaatan Ampas Tahu di Daerah Pedesaan hayati, kinanti resmi; Safirin, Moch. Tutuk; Ernawati, Dira; sholeha, fitriatus; prakosa, albertus Adriyanto
abdimesin Vol. 3 No. 2 (2023): Abdi-mesin
Publisher : UPN "Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/abdimesin.v3i2.59

Abstract

Sumber daya lokal guna meningkatkan produksi ikan lele di lingkungan pedesaan dengan memanfaatkan ampas tahu sebagai pakan alternatif. Latar belakang penelitian ini muncul dari tantangan yang dihadapi oleh komunitas pedesaan, yang seringkali menghadapi kendala dalam meningkatkan ketahanan pangan dan ekonomi mereka. Kendala-kendala tersebut meliputi keterbatasan sumber daya, akses terbatas terhadap teknologi modern, dan perubahan iklim yang berdampak pada sektor pertanian. penggunaan ampas tahu sebagai bahan pakan juga membantu mengurangi dampak limbah yang biasanya dihasilkan selama produksi tahu. Hal ini merupakan langkah positif menuju pengelolaan lingkungan yang lebih berkelanjutan.
Analysis of the Influence of Service Quality, Store Atmosphere, Visual Merchandising on Interest and Repeat Purchases Khuluq, Muhamad Khusnul; Safirin, Moch. Tutuk
Journal La Sociale Vol. 5 No. 6 (2024): Journal La Sociale
Publisher : Borong Newinera Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37899/journal-la-sociale.v6i1.1517

Abstract

In the world of the culinary industry, competition in the restaurant business is increasingly fierce. Wizzmie must continue to provide the best offers for consumers. People's buying interest in visiting restaurants is not only because of the delicious taste of food and drinks, but also because of the quality of service, comfortable atmosphere and attractive product sales. Researchers are interested in knowing the influence of Service Quality, Store Atmosphere and Visual Merchandising variables on consumer interest and repeat purchases at Wizzmie Rungkut branch. The focus of this research is customers of the Rungkut branch of Wizzmie Restaurant with 110 respondents using the purposive sampling method. Research data was obtained from distributing questionnaires using a Likert scale. The research results show that the Purchase Interest variable has a moderate influence on the dependent variable at 49%, as well as the Repeat Purchase variable at 44.7%. The GoF test result of 0.553 shows that the entire SEM-PLS model is in the high suitability category, so that the data is able to explain the relationship between the variables studied. The variables Service Quality and Visual Merchandising have a significant effect on Purchase Interest, and Purchase Interest has a significant influence on Repeat Purchases, while Store atmosphere has no influence on Purchase Interest.
Analisis Pengendalian Persediaan Bahan Baku dengan Metode Min-Max Stock Pada PT Berkah Anugerah Inti Semesta Bagaskara, Tegar Winoto; Safirin, Moch. Tutuk
Jurnal Serambi Engineering Vol. 10 No. 1 (2025): Januari 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study analyses the management of raw material inventory at PT Berkah Anugerah Inti Semesta using the Min-Max Stock method. This study aims to identify problems in inventory control that often result in overstocking and understocking, which affects operational efficiency and storage costs. The research methods include observation and interviews to collect data on the use and purchase of raw materials over a period of time. The results showed that the application of the Min-Max Stock method was able to reduce the risk of raw material shortages and significantly reduce storage costs. The determination of safety stock, minimum and maximum stock levels provides companies with clear guidance on how to maintain stock levels. These findings confirm the importance of an efficient inventory management strategy to improve smooth production and the company's competitiveness in the market. This research is expected to be a reference for other companies facing similar challenges, providing insights into effective inventory control practices.
Analysis of Phonska Fertilizer Product Quality Control Using Seven Tools Method With Fmea: A Case Study Ariestiyani, Fitria Novi; Safirin, Moch. Tutuk
Journal La Multiapp Vol. 6 No. 1 (2025): Journal La Multiapp
Publisher : Newinera Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37899/journallamultiapp.v6i1.1850

Abstract

This study aims to analyze the quality control of Phonska fertilizer products at Phonska Warehouses II and III of PT Petrokimia Gresik using the Seven Tools and Failure Mode and Effects Analysis (FMEA) methods. Seven Tools are used to identify and map the root causes of production defects through Pareto diagrams, cause-and-effect diagrams, and control charts, while FMEA is used to measure and mitigate potential failures in the production process. The study was conducted during the period April to October 2024 with product defect data collected and analyzed. The results showed that the main defects were no coating oil (34%) followed by mesh (29%), caking (24%), and no color pigment (13%). The implementation of corrective steps based on Seven Tools and FMEA has proven effective in reducing product defects to increase production efficiency and the quality of Phonska fertilizer.
Quality Control of Paint Tube Products Using Six Sigma and FMEA Methods Khunaifi, Nasywa Shabrina; Safirin, Moch. Tutuk
Journal La Multiapp Vol. 6 No. 1 (2025): Journal La Multiapp
Publisher : Newinera Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37899/journallamultiapp.v6i1.1852

Abstract

PT XYZ is facingproduct quality challenges, especially visual defects in 25 kg pail tubes such as unmold tubes, jetting tubes, and IML on overlapping tubes with unmold tubes reached 55%. This study aims to analyze the main causes of defects in paint tube products at PT XYZ. The methods used are Six Sigma and FMEA with secondary data from the type of 25 kg tube defects in the last 3 months, involving 15 samples with 3 types of defects. The results show that material, mold, machine, and human factors contribute to defects. The Six Sigma value is 3.36, which is below standard. Recommendations for quality improvement are given to reduce the defect rate, with the highest RPN being 240 for unmold tubes.
Forecasting Analysis of Heavy Equipment Repair Services Using the Time Series Method at PT Putra Jawamas Achmad, Azka Nurissyaban; Safirin, Moch. Tutuk
Indonesian Interdisciplinary Journal of Sharia Economics (IIJSE) Vol 8 No 2 (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.v8i2.6300

Abstract

Forecasting is the art and science of predicting future events. Forecasting is an important thing to do research in companies, especially at PT Putra Jawamas, to provide ease in estimating resources and service needs. In companies engaged in the field of repair and fabrication, there are resource needs and service needs that must be prepared to maintain the stability and quality of services. Forecasting is a theory for estimating future events by involving the historical past retrieval. This company uses forecasting to estimate the demand for heavy equipment repair services in the future using the time series method, which is part of several methods, including single exponential smoothing, weighted moving average, and moving average. The research methods used are interviews, observations, historical data collection and literature studies related to this discussion. The results of this study indicate that the best research method of the weighted moving average and exponential smoothing methods for the demand for heavy equipment repair services at PT Putra Jawamas is exponential smoothing with α = 0.2 and the forecast for October 2023 is 4 units.
Waste Reduction in the Sickle Production Process Using the VALSAT Method and Value Stream Mapping Jatmiko, Lovia Vioni Putri; Safirin, Moch. Tutuk
Golden Ratio of Data in Summary Vol. 5 No. 2 (2025): February - April
Publisher : Manunggal Halim Jaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52970/grdis.v5i2.936

Abstract

This research aims to minimize waste in the sickle production process at PT XYZ by applying Lean Manufacturing techniques, specifically Value Stream Mapping (VSM) and Value Stream Analysis Tools (VALSAT). The study began with direct observation and data collection of production activities to identify non-value-added activities (NNVA) and waste. Types of waste, including defects, excessive inventory, and waiting times, were identified and analyzed using the 5 Whys method to determine their root causes. Process Activity Mapping (PAM) was employed to classify activities into value-adding, non-value-adding, and necessary non-value-adding categories. Improvements were implemented, such as optimizing material transfers with forklifts, reducing waiting times, and strengthening quality control processes. As a result, non-value-adding activities were reduced from 9% to 0%, significantly enhancing production efficiency.
Analisis Kualitas Layanan Aplikasi Ruangguru dengan E-Servqual dan Net Promoter Score (NPS) Subchan, Wafa; Safirin, Moch. Tutuk
Limits: Journal of Mathematics and Its Applications Vol. 22 No. 2 (2025): Limits: Journal of Mathematics and Its Applications Volume 22 Nomor 2 Edisi Ju
Publisher : Pusat Publikasi Ilmiah LPPM Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/limits.v22i2.4364

Abstract

Digital transformation in the education sector has led to an increase in the use of online learning applications such as Ruangguru. Ruangguru is an online learning platform, which offers various digital products to support the learning process and provide a more interactive learning experience. However, meeting customer satisfaction and gaining user loyalty are key challenges in digital service development. This study aims to analyze the service quality of the Ruangguru application using the e-servqual approach which has seven dimensions, efficiency, fulfillment, reliability, privacy, responsiveness, compensation, and contact, to identify areas of improvement needed, as well as the Net Promoter Score (NPS) method to determine customer loyalty in using the Ruangguru application. Data was collected through questionnaires to 100 respondents who use the Ruangguru application. The results show that there is a gap between customer perceptions and customer expectations with a negative value, which indicates that the Ruangguru application has not met user expectations. The NPS value obtained from the formula calculation is 21, which indicates the level of customer loyalty is within the loyal parameter.
The Effect of Incentives, Motivation, and Leadership on Sales through Employee Performance Aldian, M. Nabil Daffany; Safirin, Moch. Tutuk
Journal La Sociale Vol. 6 No. 6 (2025): Journal La Sociale
Publisher : Borong Newinera Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37899/journal-la-sociale.v6i6.2255

Abstract

This research investigates the effects of incentives, motivation, and leadership on sales improvement, considering employee performance as a mediating variable, within the context of CV. Sendy Leather. A quantitative research design was applied, employing the Partial Least Squares Structural Equation Modeling (PLS-SEM) method through SmartPLS 4 software. The study involved 44 participants from both the production and marketing departments. Findings reveal that incentives and leadership significantly impact employee performance, whereas motivation does not. Moreover, only performance demonstrates a significant direct effect on the improvement of sales. The direct influence of incentives, motivation, and leadership on sales was found to be statistically insignificant. Additionally, the mediation analysis indicates that employee performance does not significantly mediate the relationship between the independent variables and sales improvement. The values obtained from R-square, Q-square, F-square, and path coefficient assessments highlight that employee performance plays a central role in enhancing sales outcomes.
Technology Adoption and User Satisfaction in Industrial Information Systems: Adopsi Teknologi dan Kepuasan Pengguna dalam Sistem Informasi Industri Prayogi, Dhimas Wahyu; Safirin, Moch. Tutuk
Academia Open Vol. 10 No. 2 (2025): December
Publisher : Universitas Muhammadiyah Sidoarjo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21070/acopen.10.2025.11732

Abstract

General background: The acceleration of digital transformation in Indonesia’s industrial sector requires effective information systems to support governance, data integration, and decision-making. Specific background: The National Industrial Information System (SIINas) was developed to meet these needs; however, its utilization in East Java remains suboptimal due to limited understanding, low awareness, and uneven adoption among industrial companies. Knowledge gap: Existing studies on technology adoption using the Technology-Organization-Environment (TOE) framework rarely examine SIINas, particularly regarding how adoption influences user satisfaction at the regional level. Aims: This study analyzes how technological, organizational, and environmental factors affect SIINas adoption and how adoption subsequently impacts user satisfaction. Results: Using a quantitative approach with PLS-SEM and 76 respondents, findings show that all three TOE dimensions significantly influence technology adoption, with environmental factors having the strongest effect. Adoption also demonstrates a strong, significant impact on user satisfaction. Novelty: This study provides the first integrated TOE–user satisfaction evaluation of SIINas at the provincial level. Implications: The results highlight the need for stronger environmental support, organizational readiness, and technological capability to enhance SIINas adoption and improve user experience within the industrial sector. Highlights: Identifies key technological, organizational, and environmental drivers of SIINas adoption. Demonstrates strong influence of adoption on user satisfaction. Provides the first regional TOE-based evaluation of SIINas in East Java. Keywords: SIINas, Technology Adoption, TOE Framework, User Satisfaction, Industrial Information Systems
Co-Authors Achmad, Azka Nurissyaban Aldian, M. Nabil Daffany Ariestiyani, Fitria Novi Bagaskara, Tegar Winoto Dira Ernawati Hayati, Kinanti Resmi Jatmiko, Lovia Vioni Putri Khuluq, Muhamad Khusnul Khunaifi, Nasywa Shabrina Nirvana, Audiansyah Agni prakosa, albertus Adriyanto Prayogi, Dhimas Wahyu sholeha, fitriatus Subchan, Wafa