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Keputusan Pemilihan Formula Sabun Menggunakan Analytical Hierarchy Process Purwani, Annie; Astuti, Amalia Yuli; Wahyuningsih, Titi; Ghozali, Muhammad Nizar
OPSI Vol 16, No 2 (2023): ISSN 1693-2102
Publisher : Jurusan Teknik Industri Fakultas Teknologi Industri UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/opsi.v16i2.9766

Waste cooking oil is one of household waste. Waste cooking oil is usually disposed to the sewers or gardens. Utilization of waste cooking oil is by recycling it into a solid soap product. The production of solid soap from waste cooking oil is a solution to reduce waste. There are various formulas for making soap products from waste cooking oil. In order to utilize waste cooking oil becomes maximal dan useful, it is necessary to select the best formula for further development. The research begins by identifying the soap formula with a simple process. The identification results obtained six soap formulas that can be produced on a household scale. The six soap formulas were then produced and tested according to Indonesia’s national standards (SNI). The method used to select the best formula was Analytical Hierarchy Process (AHP), which involved four partisipants as experts. The result of the decision of the best soap formula is Soap 6. Meanwhile, the three priority attributes for decision-making are soap standard (SNI), cleaning power, and the ability to hold bacteria.

Pemetaan Potensi Pelaku Informal (Bengkel) Sepeda Motor Listrik yang Bersedia Melakukan Daur Ulang Limbah Baterai Annie Purwani; Ichsanul Fikri Umar Irawan; Iqbal Ramadhan
Venus: Jurnal Publikasi Rumpun Ilmu Teknik Vol. 3 No. 4 (2025): Venus: Jurnal Publikasi Rumpun Ilmu Teknik
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/venus.v3i4.1045

Batteries are the primary component in electric motorcycle propulsion systems, playing a crucial role in storing and supplying energy. However, batteries have a limited lifespan, potentially becoming waste after their useful life. Battery waste is categorized as hazardous and toxic waste (B3) because it contains heavy metals and chemical compounds that can negatively impact human health and the environment if not managed properly. As the adoption of electric motorcycles increases in Indonesia, particularly in the Special Region of Yogyakarta (DIY), the issue of battery waste management is becoming increasingly important. Currently, there are no electric motorcycle manufacturers openly willing to manage post-life battery waste, particularly through recycling activities. This situation creates a gap that informal actors could potentially exploit. Informal actors often possess flexibility and basic technical skills, but their capacity to manage battery waste safely and sustainably still needs to be mapped and strengthened. This study focused on mapping the potential capabilities of informal actors in the Special Region of Yogyakarta by 2025. The results indicate that the potential for informal actors capable of providing battery repair services is only around 1%. This figure is very small and therefore insufficient to support future battery waste management needs. Therefore, multi-stakeholder support is needed, from the government and manufacturers to the community, to encourage capacity building among informal actors. This effort is crucial to anticipate the success of the government's 2030 target for electric vehicle conversion, while also ensuring environmental sustainability.

Keputusan Pemilihan Formula Sabun Menggunakan Analytical Hierarchy Process Purwani, Annie; Astuti, Amalia Yuli; Wahyuningsih, Titi; Ghozali, Muhammad Nizar
OPSI Vol 16 No 2 (2023): ISSN 1693-2102
Publisher : Jurusan Teknik Industri, Fakultas Teknologi Industri UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/opsi.v16i2.9766

Waste cooking oil is one of household waste. Waste cooking oil is usually disposed to the sewers or gardens. Utilization of waste cooking oil is by recycling it into a solid soap product. The production of solid soap from waste cooking oil is a solution to reduce waste. There are various formulas for making soap products from waste cooking oil. In order to utilize waste cooking oil becomes maximal dan useful, it is necessary to select the best formula for further development. The research begins by identifying the soap formula with a simple process. The identification results obtained six soap formulas that can be produced on a household scale. The six soap formulas were then produced and tested according to Indonesia’s national standards (SNI). The method used to select the best formula was Analytical Hierarchy Process (AHP), which involved four partisipants as experts. The result of the decision of the best soap formula is Soap 6. Meanwhile, the three priority attributes for decision-making are soap standard (SNI), cleaning power, and the ability to hold bacteria.

Management of battery waste recycling by electric motorbike workshops: A literature review Purwani, Annie; Budijati, Siti Mahsanah; Asih, Hayati Mukti
OPSI Vol 17 No 1 (2024): ISSN 1693-2102
Publisher : Jurusan Teknik Industri, Fakultas Teknologi Industri UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/opsi.v17i1.12173

Battery waste needs to be managed immediately and thus electric vehicles (EVs) become more popular as a sustainable replacement for internal combustion engine vehicles. This review discusses waste battery recycling industry practices and emphasizes the need for authorized battery management services for electric motorcycles. This gap allows third-party businesses not affiliated with the primary manufacturer to emerge and potentially grow sustainably. The literature review methodology involves an in-depth search of relevant literature using the Scopus database with strategically selected keywords. The VoS Viewer collects, organizes, and graphically maps references to synthesize them orderly. The search initially yielded 138 relevant articles. This number was then narrowed to 66 articles published in English journals. Thirty-nine articles were found when the search was modified to focus on full-text availability. These findings indicate an important need for more targeted research to design effective management frameworks for recycling waste batteries in electric motorbike workshops. All critical components increased waste management awareness and expertise among workshop managers, government policies, funding support, and a well-coordinated supply chain. This assessment identifies barriers to developing a viable battery waste recycling sector and makes recommendations for future policy and research initiatives.

Responding to the potential environmental impact to extend battery life: Preliminary study of informal actors' readiness Annie Purwani; Siti Mahsanah Budijati; Hayati Mukti Asih; Tatbita Titin Suhariyanto; Choirun Nisa
Jurnal Sistem dan Manajemen Industri Vol. 9 No. 2 (2025): December
Publisher : Universitas Serang Raya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30656/jsmi.v9i2.10472

The increasing number of electric motorcycles in Indonesia has created new challenges related to battery waste management, potentially impacting human health, the environment, and resource scarcity. This study aims to assess the potential life cycle impacts of a 1.0 kWh electric motorcycle battery product system under repair treatment for two widely used battery types: NMC and LFP. The study used a Life Cycle Assessment (LCA) method with gate-to-gate assessment. The assessment results for both battery types with repair treatment had the greatest impact on the midpoint of freshwater eutrophication. Based on the normalized results of the five impact categories assessed, the repair treatment on LFP type batteries showed better environmental performance than the NMC type. The balancing process was found to have the greatest environmental impact for both battery types. This study confirms that recycling management by informal actors is a significant solution. The repair treatment solution contributes to providing benefits in extending the battery life cycle and does not have the potential for significant environmental impacts.

Developing stakeholders in the circular supply chain of EV batteries: Initiate strategy Ramadhan, Iqbal; Purwani , Annie
OPSI Vol 18 No 2 (2025): OPSI - December 2025
Publisher : Jurusan Teknik Industri, Fakultas Teknologi Industri UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/opsi.v18i2.15631

The significant increase in the number of electric vehicles has led to the accumulation of used battery waste. This waste has the potential to pollute the environment, so a solution in the form of battery recycling (repair, refurbishment, reuse) is needed. However, this effort is hampered by the availability of workshops capable of recycling electric batteries. This study aims to identify and analyze the factors that influence repair shops' intentions to recycle electric batteries. These factors were collected through an open questionnaire classified based on the PESTEL framework, then the weight of each factor's importance was determined using the AHP method to formulate the initiation of electric vehicle battery recycling growth. The study prioritized the factors contributing to repair shops' intention to recycle batteries as follows: economic, technological, social, and environmental factors. The order of priority of these factors was then formulated as an initiation strategy: developing technological infrastructure and training, providing green certification, tax breaks and financial support, producer responsibility policies, and building partnerships. This research makes an important contribution to initiating strategies to address electric vehicle battery waste through a systematic approach in Indonesia.

EV Battery Recycling Adoption: Insights from Dealers and Workshops in Yogyakarta, Indonesia Ichsanul Fikri Umar Irawana; Annie Purwani
Engineering Science Letter Vol. 5 No. 02 (2026): In Press - Engineering Science Letter
Publisher : The Indonesian Institute of Science and Technology Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56741/IISTR.esl.002076

The rapid growth of electric vehicles in Indonesia has intensified battery waste management challenges, while the participation of informal repair businesses in battery recycling services remains limited. Existing studies have largely focused on consumers' recycling behavior, providing little understanding of how informal actors develop the intention to provide recycling services. This study develops a TPB-based behavioral framework by incorporating environmental, social, economic, and technological dimensions as contextual determinants of intention. Survey data from informal repair businesses in Yogyakarta were analyzed using Partial Least Squares Structural Equation Modeling (PLS-SEM). The results show that the environmental and technological dimensions significantly influence intention, whereas the social and economic dimensions do not. Intention, in turn, significantly increases willingness to provide battery recycling services. These findings indicate that the underlying behavioral mechanisms of recycling service providers are driven primarily by environmental awareness and technological readiness. This study contributes by elucidating the mechanisms that shape the intentions of recycling service providers, an underexplored stakeholder group in developing countries, and offers practical suggestions for designing interventions that strengthen battery recycling services through environmental education, the provision of appropriate technology, and clear institutional support to encourage participation.

From Field Data to Analytical Queueing Model: A Two-Periode Assessment of M/M/2 Service Capacity at a Gas Station Annie Purwani; Rivaldi Laode; Maghfira Samsi; Nazla Khaira Adz Dzurr; Muhammad Panca Nugraha
Bincang Sains dan Teknologi Vol. 5 No. 02 (2026): Bincang Sains dan Teknologi
Publisher : The Indonesian Institute of Science and Technology Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56741/bst.v5i02.2567

Queueing systems at gas stations (SPBU) exhibit variable arrival and service characteristics; thus, selecting an appropriate queueing model requires aligning assumptions with empirical conditions. This study aims to identify the probability distribution characteristics of inter-arrival times and service times and to evaluate their fit with the assumptions of the M/M/2 queueing model at the Tugu 44.552.15 gas station. Data were collected through customer-level observations during two sessions—July 10, 2026, and August 12, 2026—between 12:00 and 15:00. Arrival and service time data were processed to derive inter-arrival and service times, which were then analyzed using distribution fitting in the Arena Input Analyzer. Several probability distributions were compared based on squared error and goodness-of-fit test results. The analysis revealed that the exponential distribution lacked statistical support to represent either inter-arrival times or service times. This pattern was consistently observed across both sessions. Thus, the system's empirical characteristics during the observation period do not support the Markovian assumptions underlying the M/M/2 model. These findings suggest that the M/M/2 model relies on relatively restrictive assumptions for representing the observed system, implying that empirical-based approaches—such as discrete-event simulation—may be suitable for further analysis.

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