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All Journal Telematika : Jurnal Informatika dan Teknologi Informasi OPSI
Trismi Ristyowati
Jurusan Teknik Industri UPN ”Veteran” Yogyakarta 55281
Electrical & Electronics Engineering Industrial & Manufacturing Engineering

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Investment analysis of solar power plant installation on the roof of the central business district office building with the best investment value Soejanto, Irwan; Poerbaningrat, Raden Muhammad Nalindra; Ristyowati, Trismi; Puryani, Puryani
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.v17i1.11233

Abstract

The Central Business District (CBD) office building is making efforts to reduce building electricity costs, and one alternative is solar power plant installation. PT. Rancang Prima Sejahtera, engaged in the solar energy industry, conducts consulting services with Central Business District office buildings, so PT. Rancang Prima Sejahtera made an indicative proposal with several solar power plant installation scenarios to be installed on the roof of the Central Business District office building. Four scenarios are created from the combination of 2 PV modules and two inverters. Each scenario created will be assessed for the level of opt, and the investment value will be calculated. In combining components using the principles of the Vereun Deutsche Ingineuer (VDI) 2222 method and assessed each scenario using six aspects of assessment.Meanwhile, the investment analysis assessment uses the parameters of Cost of Energy (CoE), Net Present Value (NPV), Internal Rate of Return (IRR), Benefit-Cost Ratio (B-CR), and discounted payback period. The results of the analysis conducted found that the third scenario was the best scenario with a percentage of the design value of 82.5%, CoE value of Rp398.31/kWh, NPV value of Rp2,451,719,005, IRR percentage of 23.75%, B-CR value of 7.8, and DPP value for 6.8 years with a project life of 30 years. The findings of the investment research indicate that the implementation of solar power plant installations in office buildings located in Central Business Districts yields long-term cost reductions in electricity expenses over a 30-year period, as opposed to relying solely on the services provided by the State Electricity Enterprise.
Perancangan Sistem Pemesanan Menu pada Kedai Teh Berbasis Customer Relationship Management (CRM) Irawati, Dyah Ayu; Zubaeda, Dyah Ayu; Ristyowati, Trismi
Telematika Vol 22 No 1 (2025): Edisi Februari 2025
Publisher : Jurusan Informatika

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Tujuan: Penelitian ini bertujuan merancang sistem pemesanan menu mandiri berbasis CRM untuk meningkatkan kinerja operasional dan interaksi pelanggan di Kedai Teh Kaula, sebuah usaha kuliner berskala kecil. Metodologi: Sistem dikembangkan dengan model waterfall dan kerangka kerja CRM Francis Buttle. Pengumpulan data dilakukan melalui observasi, wawancara, dan telaah pustaka, dilanjutkan dengan pembuatan Use Case Diagram, ERD, DFD, dan wireframe antarmuka. Hasil: Desain sistem mendukung desain sistem pemesanan mandiri lewat QR code serta fungsi admin untuk pengelolaan pesanan dan data pelanggan. Desain sistem ini mengatasi antrian panjang, meningkatkan akurasi pesanan, dan memperbaiki pengalaman pengguna. State of the Art: Penelitian ini menunjukkan integrasi praktis strategi CRM pada tahap awal perancangan sistem, memberikan model yang skalabel bagi usaha kecil yang menjalani transformasi digital.
Co-Authors Dyah Ayu Irawati, Dyah Ayu Irwan Soejanto Poerbaningrat, Raden Muhammad Nalindra Puryani . Zubaeda, Dyah Ayu