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All Journal International Journal of Social Service and Research
Sudjaniah, Derah
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Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Social Sciences

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From Factory Floor to Market the Role of Just-in-Time and Lean Operations in Enhancing Competitive Advantage Sudjaniah, Derah; Nasrullah; Jailani; Dharmawan, Handhika; Miko, Nanda Temas
International Journal of Social Service and Research Vol. 5 No. 7 (2025): International Journal of Social Service and Research
Publisher : Ridwan Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46799/ijssr.v5i7.1279

Abstract

This study aims to analyze the influence of lean practices and just-in-time (JIT) practices on the competitive advantage of Indonesian manufacturing companies, with time-to-market speed as a mediating variable. A quantitative approach was employed using data from 150–200 respondents and analyzed using Structural Equation Modeling (SEM) via AMOS. The results show that lean practices significantly influence competitive advantage and accelerate time-to-market. Time-to-market speed serves as a significant mediator between lean and competitive advantage. Conversely, while JIT has a direct positive effect on competitive advantage, its impact on time-to-market is insignificant. This study is limited by its sample size and geographic focus, which may affect the generalizability of the findings to other regions or industries outside the Indonesian manufacturing sector. These findings highlight the importance of strengthening lean practices in the Indonesian manufacturing context and emphasize the need for system readiness to implement JIT effectively. This study contributes to the existing literature by examining time-to-market as a mediating variable and by providing empirical insights into how lean and JIT practices influence competitive advantage in an emerging market context.
Framing Cosmetic Purchase Decisions in the Digital Era: The Role of Influencer Storytelling and Consumer Reviews with Self Brand Connection as a Moderating Variable Sudjaniah, Derah; Sascha, Indira; Arita, Melva; Yulistiyaningsih, Arum; Siregar , Rio Octogi
International Journal of Social Service and Research Vol. 5 No. 8 (2025): International Journal of Social Service and Research
Publisher : Ridwan Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46799/ijssr.v5i8.1288

Abstract

This study aims to analyze the influence of influencer storytelling and consumer reviews on cosmetic product purchase decisions, with self-brand connection as a moderating variable. The focus is on cosmetic consumers across Indonesia within the context of digital marketing. The theoretical foundation includes the Theory of Planned Behavior, Elaboration Likelihood Model, and Self-Congruity Theory. A quantitative method using Partial Least Squares–Structural Equation Modeling (PLS-SEM) was employed. The findings reveal that both influencer storytelling and consumer reviews positively affect purchase decisions. Moreover, self-brand connection strengthens the relationship between these variables and purchase decisions, highlighting the emotional role consumers play in shaping brand preference. These findings provide both theoretical and practical implications, especially in crafting effective digital marketing strategies for local cosmetic brands. The study emphasizes the importance of fostering emotional bonds between brands and consumers to enhance loyalty and drive purchase decisions.
Impact of Production Planning, Inventory Management, and Demand Forecast Accuracy on Operational Performance: The Moderating Role of Sustainability-Oriented Green Supply Chain Management Among Retail Smes in Jakarta Sudjaniah, Derah; Lu’luatuwwafiroh, Lu’luatuwwafiroh; Utami, Mia; Sugiyono, Sugiyono; Yaqin, Ainul
International Journal of Social Service and Research Vol. 5 No. 9 (2025): International Journal of Social Service and Research
Publisher : Ridwan Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46799/ijssr.v5i9.1307

Abstract

This study examines the influence of production planning, inventory management, and demand forecast accuracy on operational performance, with sustainability-oriented Green Supply Chain Management (GSCM) as a moderating variable, among retail SMEs in Jakarta. Utilizing a mixed methods approach, the research integrates quantitative analysis through Structural Equation Modeling (PLS-SEM) with qualitative insights from semi-structured interviews. The findings reveal that all three operational factors significantly enhance operational performance, supporting theories of aggregate and stochastic production planning, dynamic inventory policies, and real-time demand sensing. Furthermore, GSCM was found to strengthen these relationships, especially when environmental practices were embedded in procurement, logistics, and supplier collaboration. However, the moderating effect varied depending on the firms' readiness and resource capacity to adopt sustainable practices. This research contributes to the existing literature by offering an integrated model tailored for SMEs in developing economies and addressing the limited empirical evidence from Indonesia. It also provides practical guidance for SME practitioners aiming to improve efficiency while aligning with sustainability goals. The study highlights the strategic importance of integrating operational excellence with green supply chain initiatives to build resilience, reduce waste, and enhance long-term competitiveness in dynamic market environments.
Co-Authors Ainul Yaqin Arita, Melva Dharmawan, Handhika Jailani Lu’luatuwwafiroh, Lu’luatuwwafiroh Miko, Nanda Temas Nasrullah Sascha, Indira Siregar , Rio Octogi Sugiyono Sugiyono Utami, Mia Yulistiyaningsih, Arum