Wahana Aktivitas dan Kreativitas Teknologi Unipasby (WAKTU) is an open-access journal that provides authors with the opportunity to publish their work in various fundamental and interdisciplinary areas of engineering. The subject coverage of WAKTU includes all aspects of Engineering, encompassing disciplines such as Aerospace, Bioengineering, Chemical, Civil and Environmental, Electrical, Energy, Industrial and Manufacturing, and Mechanical Engineering. WAKTU Journal welcomes the submission of two types of papers: full research papers and article review papers. We value the importance of high-quality research and therefore subject all submitted manuscripts to a rigorous peer-review process. This ensures the integrity and excellence of the published work. WAKTU Journal follows a biannual publication schedule, with Issue No. 1 released in January and Issue No. 2 in July. This allows us to provide a regular platform for researchers to share their findings and contribute to the field of engineering.
Fakultas Teknik , Universitas PGRI Adi Buana Surabaya
PEMETAAN FAKTOR PENYEBAB STUNTING DI KECAMATAN WARU, KABUPATEN SIDOARJO
Waru District is one of the districts in Sidoarjo Regency and is a district focused on stunting based on the Decree of the Regent of Sidoarjo Regency in 2021. Waru District is one of 6 districts in special locations for handling stunting in Sidoarjo Regency. The stunting rate in Waru District is categorized as high with a case percentage of 19% in 2021. This study aims to map the causes and problems of stunting, priorities for handling and how to handle stunting. The research method uses qualitative descriptive analysis with content analysis techniques using NVIVO. Data collection methods are carried out through interviews, documentation and surveys of related agencies. The results of the study show that the mapping of causes of stunting is influenced by social, economic and unemployment aspects. The policy implications that can be taken are to reduce stunting rates by increasing the implementation of village programs based on food security.
Copyright (c) 2025 WAKTU: Jurnal Teknik UNIPA
Pengaruh Variasi Jumlah Perekat Tepung Tapioka terhadap Nilai Kalor Briket dari Arang Ampas Tebu Kuning dan Ampas Tebu Hitam
Indonesia menghasilkan ampas tebu dalam jumlah besar yang dapat dimanfaatkan sebagai bahan baku briket arang bernilai ekonomi. Penelitian ini mempunyai tujuan untuk mengetahui pengaruh variasi jumlah perekat tepung tapioka terhadap nilai kalor dengan menggunakan bahan baku ampas tebu kuning dan ampas tebu hitam. Metode yang digunakan true experiment dengan variasi jumlah perekat tepung tapioka yaitu 0%, 10%, 20% dan 30%. Proses pembuatan briket meliputi: pengeringan, karbonisasi, penggilingan, pengayakan, pencampuran dan pencetakan. Briket dicetak berbentuk kubus dengan diameter 2,5cm × 2,5 cm. Pengepresan menggunakan alat hidrolik manual dengan dongkrak 3 ton dan pressgauge. Pengeringan briket memakai oven listrik pada suhu 90°C selama 1,5 jam. Pengujian nilai kalor menggunakan alat bomb calorinmeter sesuai standar ASTM D 5865-19. Hasil penelitian menunjukkan bahwa komposisi perekat 10% menghasilkan briket dengan kualitas fisik terbaik, tidak mudah pecah dan hancur serta nilai kalor briket arang tebu kuning sebesar 4121,62 Cal/g dan arang tebu hitam sebesar 5053,5 Cal/g.
Copyright (c) 2026 WAKTU: Jurnal Teknik UNIPA
Comparative Analysis of the Characteristics of Biodegradable Plastics Based on Cassava Starch, Durian Seed Starch, and Purple Sweet Potato Starch
Conventional plastics made from synthetic polymers have non-biodegradable properties that cause environmental problems. This study aims to compare the characteristics of biodegradable plastics based on cassava starch, durian seed starch, and purple sweet potato starch. Film production was carried out using a blending method with varying chitosan concentrations (0; 1; and 2%). Characterizations carried out included tensile strength, elongation, swelling, air solubility, and biodegradation tests. The results showed that the type of starch and chitosan concentration significantly affected the mechanical and physical properties of biodegradable plastics. Purple sweet potato starch plastic had the highest tensile strength, the lowest swelling and air solubility values, but the slowest biodegradation rate. Cassava starch plastic showed balanced mechanical and degradation characteristics. Meanwhile, durian seed starch plastic had the lowest tensile strength, the highest swelling and air solubility values, but the fastest biodegradation rate.
Analisis Risiko Internal Leakage pada LPG Treating Unit Menggunakan Metode Failure Mode and Effects Analysis
Internal leakage in LPG Treating Units could reduce process stability, increase product loss, and weaken operational safety barriers. This study aimed to analyze the risk of internal leakage in valve systems and pressure containment equipment using Failure Mode and Effects Analysis. Data were obtained through field observations, semi-structured interviews, historical failure records, and operating parameters. Five failure modes were identified, including LPG control valve passing, internal leakage in emergency shutdown valves, nitrogen valve passing, pressure safety valve seat leakage, and flange connection leakage. The results showed that LPG control valve passing had the highest risk value of 336, followed by emergency shutdown valve internal leakage with a value of 315. Both failure modes were classified as high-risk conditions because they affected pressure stability, product loss, and emergency isolation reliability. Mitigation through predictive maintenance, periodic inspection, and seat and seal replacement was estimated to reduce the risk level by more than 50%.
Development of an Edge-Based Connected Instrumentation and Monitoring System Using an Multi-Parameter Spatial Decision Index for Multi-Node Soil Sensing
Single-point soil monitoring is often insufficient to characterize land conditions that exhibit spatial variation. This study proposes a multi-node soil monitoring system that integrates capacitive soil moisture sensors, soil pH sensors, LoRa communication, and an Edge-Based Spatial Aggregation approach using the Multi-Parameter Spatial Decision Index (MSDI). Four sensor nodes periodically transmit data to a gateway for aggregation and decision-making before the data is displayed on a dashboard. The evaluation covers sensor accuracy, communication performance, and decision consistency. Test results show a Packet Delivery Ratio of 98.25% with an average delay of less than 135 ms, as well as stable communication. The MSDI method is capable of classifying soil conditions into the categories of Critical, Moderate, and Optimal, while reducing the influence of extreme readings from a single node. The proposed approach produces more representative information on land conditions and supports decision-making in Internet of Things-based precision agriculture systems.
Kondisi Satuan Kemampuan Lahan (SKL) Kawasan Lembah Pandawa Kabupaten Pasuruan
Kawasan Wisata Lembah Pandawa di Kabupaten Pasuruan merupakan kawasan rekreasi berbasis ruang terbuka yang berkembang dengan memanfaatkan kondisi bentang lahan perdesaan dan perbukitan. Pemanfaatan lahan pada kawasan wisata ini memerlukan perhatian terhadap karakteristik fisik wilayah agar tidak menimbulkan permasalahan lingkungan maupun risiko keselamatan. Penelitian ini bertujuan untuk menganalisis Satuan Kemampuan Lahan (SKL) sebagai dasar evaluasi kesesuaian pemanfaatan lahan kawasan wisata Lembah Pandawa. Metode penelitian yang digunakan meliputi analisis spasial terhadap parameter fisik lahan, yaitu kemiringan lereng, ketinggian wilayah, dan curah hujan, yang selanjutnya diintegrasikan dalam peta SKL. Hasil analisis menunjukkan bahwa kawasan kajian didominasi oleh kemiringan lahan landai hingga menengah dengan curah hujan cukup tinggi dan ketinggian wilayah yang membentuk iklim mikro sejuk. Kondisi tersebut secara umum mendukung pengembangan aktivitas wisata, namun pada beberapa bagian kawasan terdapat keterbatasan lahan yang memerlukan pengelolaan khusus, terutama terkait pengendalian lereng dan sistem drainase. Oleh karena itu, penerapan pengelolaan kawasan berbasis Satuan Kemampuan Lahan diperlukan untuk menjamin keselamatan pengunjung serta keberlanjutan pengembangan Kawasan Wisata Lembah Pandawa.
ANALISIS RTH PUBLIK DAN KERAPATAN VEGETASI UNTUK KEBERLANJUTAN LINGKUNGAN DI KABUPATEN MANGGARAI
Ketersediaan ruang terbuka hijau (RTH) publik di Kabupaten Manggarai hanya mencapai 4.703 hektare atau sekitar 3,5% dari total luas wilayah, yang berarti masih jauh di bawah standar minimal sebesar 20% dari luas wilayah. Tujuan dari penelitian ini adalah untuk mengetahui ketersediaan RTH publik dan tingkat kerapatan vegetasi di Kabupaten Manggarai. Metode yang digunakan meliputi analisis deskriptif kuantitatif dan analisis NDVI. Pengumpulan data dilakukan melalui observasi, dokumentasi, dan studi pada instansi terkait. Hasil Penelitian menunjukkan bahwa RTH publik di Kabupaten Manggarai pada 2024 mencakup taman kota 4,23 Ha (0,09%), pemakaman umum 3.604,01 Ha (76,61%), jalur hijau 420,03 Ha (8,93%), dan lapangan olahraga 674,73 Ha (14,34%), dengan total 4.703 Ha atau 3,5% dari luas wilayah. Angka ini masih jauh di bawah standar 20% sesuai Permen ATR/BPN No. 14/2022 yang menetapkan kebutuhan ideal 26.876,60 Ha. Secara ekologis, wilayah didominasi kerapatan vegetasi rapat (30,94%) dan kerapatan vegetasi sangat rapat (38,73%). Hasil analisis dapat direkomendasikan bahwa untuk keberlanjutan lingkungan di Manggarai Barat, maka prosentase ketersediaan RTH publik seyogyanya ditingkatkan hingga mencapai minimal 20%.
Kajian Bibliometrik: Ruang Terbuka Publik dan Well-Being Perkotaan dalam Mewujudkan Kota Bahagia
Pesatnya perkembangan kawasan perkotaan memunculkan berbagai permasalahan terkait kualitas lingkungan dan kesejahteraan masyarakat perkotaan. Dalam konteks tersebut, ruang terbuka publik dipandang memiliki peran penting dalam mendukung urban well-being dan mewujudkan kota bahagia (happy city). Penelitian ini bertujuan untuk menganalisis perkembangan penelitian mengenai ruang terbuka publik dan urban well-being menggunakan pendekatan bibliometrik berbasis data Scopus yang divisualisasikan melalui VOSviewer. Hasil analisis menunjukkan bahwa penelitian berkembang pesat pada periode 2016–2025 dengan tema dominan berupa greenspace, happiness, quality of life, urban planning, dan well-being. Analisis network visualization menunjukkan bahwa penelitian masih didominasi oleh kajian ruang terbuka hijau dan kualitas hidup masyarakat perkotaan, sedangkan overlay visualization menunjukkan perkembangan tema baru seperti public space, subjective well-being, accessibility, dan sustainability. Hasil tersebut menunjukkan adanya perkembangan penelitian menuju pendekatan perencanaan kota yang lebih berorientasi pada kesejahteraan masyarakat dan keberlanjutan perkotaan.
Pengendalian Risiko Keselamatan Kerja Unit SLPGT Berbasis JSA-HIRADC
The SLPGT unit has high occupational safety risks because it involves LPG, 15% caustic soda, MDEA, pressurized systems, valve operation, inspection, maintenance, and potential leakage. This study aims to analyze and formulate occupational safety risk control in the SLPGT unit using JSA-HIRADC. JSA was used to identify hazards in each work activity, while HIRADC was used to assess risks based on likelihood and consequence. The results identified 12 potential hazards, consisting of 4 high risks, 7 medium risks, and 1 low risk. The highest risks were found in 15% caustic soda filling with a risk score of 16, leakage handling with a risk score of 15, valve opening and closing with a risk score of 12, and minor maintenance with a risk score of 12. Recommended controls include closed transfer systems, gas detection, LOTO, permit to work, emergency shower, spill kit, checklists, and chemical PPE. This study confirms that SLPGT risk control must be based on activity priority and control hierarchy.
Analisis Risiko Overpressure Pada Propylene Recovery Unit Dengan FMEA
The Propylene Recovery Unit (PRU) is exposed to overpressure risk caused by process control disturbances, instrumentation failures, pressure protection failures, and human error. This study aimed to analyze overpressure risk in a PRU using Failure Mode and Effects Analysis (FMEA). Data were obtained through process observation, literature review, and severity, occurrence, and detection assessment of critical components. Eight failure modes were identified: uncontrolled distillation column pressure, stuck PRV/PSV, pressure transmitter error, stuck control valve, pressurized pipe leakage, heat exchanger fouling, HIPPS failure, and operational human error. The results showed that operational human error had the highest RPN of 280, followed by pressure transmitter error with 245, stuck PRV/PSV with 240, and stuck control valve with 240. These findings indicate that overpressure risk is influenced by human factors, instrumentation reliability, pressure protection, and process control performance. Recommended mitigations include operator training, instrumentation calibration, PRV/PSV testing, and control valve improvement.
Prototipe Kontrol Otomatis Dinamo Water Pump PDAM Toraja Utara berbasis Programmable Logic Controller (PLC) Schneider
Sistem kontrol dinamo water pump pada PDAM Toraja Utara masih menggunakan sistem konvensional atau dikontrol secara manual sehingga kurang efektif dan tidak efisien. Penelitian ini bertujuan untuk merancang suatu sistem kontrol otomatis berbasis programmable logic controller (PLC). Metode Research and Development digunakan sebagai metode untuk menghasilkan atau mengembangkan prototipe kontrol ini. Perancangan prototipe dimulai dari pembuatan papan rangkaian panel kontrol, rangkaian pengawatan kontrol, rangkaian instalasi dan diagram ladder. Prototipe kontrol otomatis dinamo water pump berbasis programmable logic controller (PLC) Schneider tipe zelio 3B261FU telah dapat bekerja dengan baik sesuai input program kontrol yang dirancang sehingga dapat bekerja secara otomatis yang dapat mempermudah dan meringankan pekerjaan dan memberikan efisiensi pada kontrol dinamo water pump.
Molecular Docking Senyawa dari Daun Averrhoa bilimbi sebagai Kandidat Inhibitor α-Glukosidase
Diabetes Melitus (DM) adalah gangguan metabolik dengan prevalensi global yang terus meningkat. Salah satu pendekatan terapeutik adalah inhibisi enzim α-glukosidase untuk mengurangi hiperglikemia pascaprandial. Daun Averrhoa bilimbi telah digunakan secara tradisional sebagai agen antidiabetes; namun, studi komputasi mengenai senyawa-senyawanya masih terbatas. Penelitian ini bertujuan untuk menganalisis potensi 29 senyawa dari daun Averrhoa bilimbi sebagai inhibitor α-glukosidase melalui pendekatan penambatan molekuler (molecular docking). Metodologi yang digunakan meliputi persiapan protein (PDB ID: 3W37) dan persiapan ligan, validasi metode redocking dengan nilai RMSD 1,523 Å, serta penambatan menggunakan AutoDock Vina. Hasil penelitian menunjukkan bahwa senyawa 5,7,4-trihidroksi-6-(1-etil-4-hidroksifenil)flavon-8-C-glukosida (kukumerin A) dan 19-Hidroksisinzeylanol 19-glukosida, memiliki nilai energi ikatan yang lebih rendah (-8,5 kkal/mol dan -8,8 kkal/mol) dibandingkan dengan akarbosa (-8,0 kkal/mol). Analisis interaksi menunjukkan senyawa tersebut membentuk ikatan hidrogen dan interaksi hidrofobik dengan residu-residu α-glukosidase seperti Asp232, Asp469, Asp568, dan Trp329. Sebagai kesimpulan, kukumerin A dan 19-Hidroksisinzeylanol 19-glukosida berpotensi untuk dikembangkan sebagai kandidat antidiabetes melalui inhibisi α-glukosidase, meskipun masih diperlukan validasi lebih lanjut secara in vitro dan in vivo.
Pengaruh Rasio Asam Sulfat dan Asam Nitrat terhadap Produksi Nitroselulosa Berbahan Baku Biomaterial
Dinamika lingkungan strategis global mendorong penguatan kemandirian industri pertahanan melalui pengembangan propelan berbasis nitroselulosa. Penelitian ini bertujuan untuk mengkaji pengaruh rasio campuran asam penitrasi terhadap kadar nitrogen dan karakteristik nitroselulosa berbasis selulosa biomaterial sebagai alternatif bahan baku propelan. Metode penelitian dilakukan melalui studi literatur sistematis terhadap publikasi ilmiah sepuluh tahun terakhir yang relevan dengan sintesis nitroselulosa, variasi rasio asam, serta kondisi reaksi. Hasil kajian menunjukkan bahwa kadar nitrogen nitroselulosa dipengaruhi secara signifikan oleh rasio H₂SO₄ : HNO₃, konsentrasi asam, suhu, dan waktu reaksi. Rasio asam dengan fraksi H₂SO₄ rendah menghasilkan rendemen tinggi namun kadar nitrogen rendah, sedangkan peningkatan fraksi H₂SO₄ hingga kondisi optimum meningkatkan derajat nitrasi dengan kadar nitrogen mencapai 13,39%, mendekati nilai teoritis 14,14%, bahkan pada kondisi tertentu mencapai 16,76%. Namun, rasio H₂SO₄ yang berlebihan berpotensi menyebabkan degradasi selulosa sehingga menurunkan efektivitas reaksi.
Analisis Pemilihan Jenis Turbin PLTMH Berdasarkan Rentang Head pada Sistem Pemanfaatan Air Buangan Pembangkit Listrik
Pemanfaatan air buangan pembangkit Listrik melalui Pembangkit Listrik Tenaga Mikro Hidro (PLTMH) merupakan strategi energy recovery untuk meningkatkan efisiensi sistem energi. Karakteristik air buangan yang umumnya memiliki head rendah hingga sangat rendah dengan debit relative stabil memerlukan pendekatan pemilihan turbin yang berbeda pada PLTA konvensional. Artikel ini menyajikan analisis kritis dan sintesis teknis pemilihan turbin PLTMH berdasarkan rentang head pada pemanfaatan air buangan pembangkit listrik. Kebaruan penelitian ini terletak pada pengembangan kerangka pemilihan turbin PLTMH yang terintegrasi dan aplikatif berdasarkan hubungan karakteristik head-debit dengan kesesuaian teknis dan kinerja turbin. Metode penelitian menggunakan systematic literatur review terhadap lebih dari 25 jurnal nasional dan internasional. Hasil kajian menunjukkan bahwa turbin Archimedes screw dan waterwheel modern paling sesuai untuk kondisi very load head (≤ 2m), sedangkan turbin crossflow optimal untuk kondisi low head hingga medium head (2-20m). Artikel ini berkontribusi dalam menyediakan acuan teknis pemilihan turbin PLTMH berbasis air buangan pembangkit untuk mengembangkan sistem energy recovery pada pembangkit listrik eksisting.
Strategi Penguatan Daya Dukung Sanitasi Berkelanjutan di Kawasan Pesisir Sukolilo Baru Surabaya
Penelitian ini bertujuan untuk mengetahui kondisi eksisting dan arahan penguatan daya dukung sanitasi berkelanjutan di wilayah pesisir Sukolilo Baru Surabaya. Metode analisis data deskriptif kualitatif dan kuantitatif. Teknik analisis data menggunakan skala likert. Pengumpulan data dilakukan dengan sebar kuisioner dan wawancara. Hasil penelitian menunjukan bahwa kondisi saluran drainase meliputi tiga aspek yakni perkerasan, keberadaan endapan serta luas saluran drainase. Seluruh saluran drainase yang tersedia memiliki perkerasan beton. Terdapat endapan pada seluruh saluran drainase yang meliputi endapan lumpur, pasir dan sampah. Luas drainase secara keseluruhan sebesar 2,45 m2 yang terdiri dari saluran primer seluas 0,39 m2 saluran sekunder seluas 0,25 m2 dan saluran tersier seluas 1,80 m2. Prasarana air limbah di wilayah pesisir Sukolilo Baru secara umum masih terbatas dan belum memiliki TPST. Pewadahan persampahan sudah dilakukan dari rumah tangga dan pewadahan komunal. Arahan penguatan daya dukung sanitasi berkelanjutan yang dapat dilakukan adalah normalisasi saluran drainase, sistem drainase tertutup, perawatan dan pembersihan drainase secara rutin, partisipasi pemerintah untuk normalisasi drainase, pengolahan air limbah yang efektif, ritasi pengangkutan sampah secara konsisten, edukasi tentang pengelolaan air limbah rumah tangga, bantuan sarana dan prasarana dari pemerintah untuk sanitasi, dan memperketat pengawasan pemerintah terhadap praktik pengelolaan sanitasi lingkungan.
Analisa Model Strategi Korporasi dalam Penetrasi Perilaku Pembelian pada Industri Roti PT. Hikmat Penuh Berkat
Larrita Bakery has become a very popular company in Surabaya. It is certainly a pioneer among food companies that cater to all segments of society. PT Hikmat Penuh Berkat is the owner of this brand, which is supported by approximately 41 outlets within the city. The purpose of this study is to examine the modeling of corporate strategy aspects, including: the influence of market segmentation, product innovation, competency development, expansion, pricing strategy, branding marketing, operational efficiency, sustainability, and agility on purchasing behavior. The results of the data analysis show that not all Corporate Strategy attributes influence Purchasing Behavior. The only attributes that have an influence are Market Segmentation (P=0.007), Product Innovation (P=0.018), Competency Development (P=0.033), and Agility (P=0.016).
Kajian Perencanaan Bangunan Gedung Konsep “Temu Gelang“ Universitas PGRI Adi Buana Surabaya (Kampus Dukuh Menanggal)
Penelitian ini bertujuan untuk mengkaji makna konsep bangunan gedung konsep temu gelang di Kampus Dukuh Menanggal Universitas PGRI Adi Buana Surabaya. Pendekatan yang digunakan adalah deskriptif kualitatif dengan metode analisis konten tematik dan interpretasi kontekstual. Hasil kajian menunjukkan bahwa RTH tidak hanya berfungsi sebagai elemen ekologis, tetapi juga sebagai ruang spiritual, sosial, dan edukatif. Penataan kampus dengan konsep “Temu Gelang” melambangkan nilai kesatuan dan kontinuitas hubungan manusia dengan Tuhan dan alam. RTH menjadi bagian penting dalam mewujudkan prinsip rahmatan lil ‘alamin, yaitu kampus yang ramah lingkungan, inklusif, dan mencerminkan nilai-nilai agama dalam perencanaan ruang yang berkelanjutan.
Implementing QFD for improving service quality and social fund management
The research conducted at Foundation X aimed to develop its services to improve the quality by identifying the attributes of the services and describing the facilities. The analysis used Quality Function Deployment (QFD). Following the preliminary survey and interviews, questionnaires were then distributed to respondents (consumers) to determine the voice of customers. Furthermore, the data were processed using QFD. The research results are as follows: 1) Transparency is the attribute with the highest importance level and with a value of importance of 4.62; 2) the Donor Service Program is the service attribute with the top priority to be developed or improve the performance and with a weight value of 4.65129; 3) the Report of Revenue/Routine Expenditures to Donors is the technical response with the top priority to be developed or improved, with a priority value of 3.00852 and a normalized contribution of 15.9%. Keywords : foundation, QFD, attribute, voice of customer
Studi perbandingan viskositas dan kelayakan beberapa merek oli SAE 10W-40 menggunakan prototipe alat falling ball viscometer
The determination of oil quality in conventional engine vehicles is carried out by measuring the coefficient of viscosity and kinematic viscosity. Good kinematic viscosity should not decrease by more than 50% from its initial value. This research uses the Falling Ball Viscometer (FBV) method to measure the viscosity of five brands of SAE 10W-40 oil: Enduro 4T Racing, Shell Advance 4T, Castrol Power 1 4T, Fastron Techno, and Mobil Supermoto at temperatures of 40°C and 100°C. Testing was performed on new oil and after traveling 3000 km. The results showed a decrease in kinematic viscosity by 21%-42% at 40°C and 24%-30% at 100°C. The device uses a reed switch magnet sensor and Arduino UNO microcontroller to process and display data on an LCD. The comparison between the device and manual measurement showed a difference of 0.12-0.7 at 40°C and 0.06-2.16 at 100°C, with an average correction of 0.84-1.5 at 40°C and 0.23-0.40 at 100°. This research is crucial for vehicle users as it provides more accurate information regarding the degradation of oil quality after usage, helping users determine the optimal time for oil replacement to maintain fuel efficiency, performance, and engine durability. For the lubricant industry, the findings of this research can be utilized to improve oil formulations that are more resistant to viscosity reduction due to temperature and mileage, thereby meeting higher quality standards in the market.
Pengembangan Kawasan Permukiman Kumuh Menjadi Kawasan Permukiman Ekologis di Kawasan Pesisir Muncar
This study aims to examine the development of slum areas into ecological settlement areas in the coastal area of ​​Muncar. Coastal areas often face various problems, such as irregular buildings, lack of facilities and infrastructure, and low environmental quality, which have an impact on community health and welfare. In this context, the development of ecological areas is important to improve the quality of life of the community while maintaining the sustainability of the coastal environment. This research approach uses a mix methods method, namely quantitative and qualitative descriptions. The results of the study are expected to provide an overview of the strategic steps that need to be taken in seven aspects such as buildings, road networks, drainage, drinking water, waste processing, wastewater processing, and fire protection.
IDENTIFIKASI HUBUNGAN ARSITEKTUR DAN ARTEFAK KOTA: STUDI TERHADAP RUMAH SAKIT DARMO, SURABAYA
Darmo Hospital in Surabaya is a historical building that embodies both historical significance and distinctive colonial architectural design by G.C. Citroen. This study aims to identify the relationship between the building’s architecture and its role in shaping Surabaya’s city identity. A qualitative descriptive approach was employed through field observations, documentation of architectural elements, and literature studies, focusing on aspects of memory, distinctiveness, and design. The findings reveal that Darmo Hospital not only symbolizes the adaptation of colonial architecture to the tropical climate but also preserves the collective memory of residents as a monumental building marking the development of the Darmo area. The authenticity of its design, which has been maintained to the present day, reinforces its function as an urban artifact that plays a significant role in the historical dynamics and identity of Surabaya.
EVALUASI EFISIENSI BIAYA DAN WAKTU PADA PROYEK PEMBANGUNAN JEMBATAN MENGGUNAKAN VALUE ENGINEERING
Value Engineering is a systematic approach aimed at enhancing the value of a project by identifying and eliminating costs that do not significantly contribute to the primary function of the construction. The objective of this study is to examine how the application of Value Engineering in bridge construction projects can improve cost and time efficiency, identify the main challenges encountered in implementing Value Engineering in bridge construction projects, and explore solutions to overcome these challenges. Additionally, this study aims to analyze the impact of Value Engineering on the quality, safety, and sustainability of bridge construction projects. The research method used in this study is qualitative. The findings indicate that Value Engineering can be a highly effective tool in enhancing the efficiency of bridge construction projects if implemented correctly. To achieve optimal results, the application of Value Engineering must be conducted through comprehensive analysis, involving experts in the field, and supported by appropriate regulations.
STRATEGI PENGEMBANGAN PARIWISATA DI SEPANJANG PEMBANGUNAN JALUR LINTAS SELATAN (JLS) DI KECAMATAN PANGGUL KABUPATEN TRENGGALEK
This research aims to identify strategies for developing the Southern Cross Route in Panggul District, Trenggalek Regency. The analysis methods used in this research are qualitative descriptive for the first problem formulation and SWOT analysis for the second problem formulation. The data collection methods used include observation, questionnaires, institutional surveys, and interviews. This research identifies tourism potential in Panggul District, supported by natural beauty and local cultural richness. The SWOT analysis results show a Strengths - Weaknesses score of -0.80 and an Opportunities - Threats score of -0.20, indicating a position in quadrant III. These findings provide a basis for developing strategies that can enhance the appeal and sustainability of tourism in the area.The tourism development strategy along the Southern Cross Route should focus on several key points. First, strengthening spatial planning regulations. Second, increasing local community involvement through education and training will empower them as key players in the tourism industry. Third, the utilization of supporting attractions, such as biodiversity and local culture, should be carried out in a sustainable manner.
IMPLEMENTASI KINERJA DAN PELAYANAN PADA BUS TRANS JATIM KORIDOR I (SIDOARJO-SURABAYA-GRESIK)
The Provincial Government of East Java, in collaboration with Perum Damri, has launched the Trans Jatim Bus Corridor I, which runs from Porong Terminal to Bunder Terminal, as part of a public transportation development initiative utilizing the Bus Rapid Transit (BRT) concept. The Trans Jatim Bus aims to provide excellent service by involving private entities as operators and serves as an innovative solution for community mobility. This study aims to evaluate the performance and service quality of public transportation, as well as the outcomes of implementing the 2016 BRT Standard on the Trans Jatim Bus Corridor I. Data collection methods include observation, questionnaires, and interviews. The analysis method used is a mixed-method approach: operational performance is analyzed quantitatively, while service performance is assessed using qualitative descriptive analysis with the Importance Performance Analysis (IPA) technique. The implementation of Trans Jatim Bus Corridor I is evaluated through qualitative descriptive analysis with scoring techniques. The operational performance results show an average load factor of 83.54%, a headway of 7 minutes during peak hours and 8 minutes during normal hours, and a passenger count of 463 people per bus per day. The Importance Performance Analysis (IPA) results indicate that the top service priorities for Trans Jatim Bus Corridor I are that drivers consistently prioritize safety and traffic flow and always use the left lane except when overtaking or changing direction. The implementation of the 2016 BRT Standard on Trans Jatim Bus Corridor I is considered good, with a service percentage of 80%. This achievement is attributed to the fulfillment of 8 out of the 9 variables of the 2016 BRT Standard.
OCCUPATIONAL HEALTH AND SAFETY RISK ANALISYS USING FMEA METHODS (FAILURE MODE AND EFFECT ANALISYS) APPROACH IN INDUSTRIAL ENGINEERING MANUFCTURING PROCESS LABORATORY OF PGRI ADI BUANA SURABAYA UNIVERSITY
The manufacturing process laboratory of Industrial Engineering, PGRI Adi Buana University Surabaya is the main laboratory in production and research. Small errors in the use of equipment or procedures that are not carried out properly can cause work accidents such as injuries, fires, and even damage to laboratory equipment. K3 risk analysis is needed to minimize the occurrence of work accidents. With this FMEA (Failure Mode and Effect Analysis) method to analyze the most influential causes and possible failures in the risk of work accidents. All severity levels are evaluated based on three criteria. The first criterion, risk assessment or Saverity (S), the second criterion, severity assessment or Occurrence (O), and the third criterion, assessment of the causes of detected failures or Detection (D). K3 analysis using the FMEA method can identify 9 risks of work accidents identified in the Industrial Engineering Manufacturing Process Laboratory, PGRI Adi Buana University Surabaya. From the results of data processing, the highest RPN value was obtained from the FMEA method analysis. RPN value of 40.86 and the second highest risk event is hearing loss due to machine noise with an RPN value of 37.58. This shows that the risk has a high enough priority in risk management efforts so that it needs special attention.
Analisis tingkat kerataan jalan dengan metode international roughness index menggunakan hawkeye 2000 (studi kasus : Jl. Gajahmada Slawi)
Jalan Gajah Mada merupakan jalan lokal utama yang banyak dilalui oleh kendaraan roda dua maupun roda empat. Jalan Gajah Mada di Kecamatan Slawi, Kabupaten Tegal, merupakan salah satu jalan utama yang penting di wilayah tersebut. Jalan ini berperan sentral dalam menghubungkan berbagai fasilitas dan lokasi penting di Slawi. Untuk mendukung kelancaran aksesibilitas dan menghindari kecelakaan, maka dilakukan analisis data tingkat kategori risiko di Jalan Gajah Mada Slawi. Dalam pengumpulan data digunakan metode Hawkeye 2000 series dan perangkat lunak Hawkeye Processing Toolkit untuk menganalisis data. Tujuan dari analisis ini adalah untuk memberikan rekomendasi kondisi jalan terhadap Indeks Kekasaran Internasional Jalan Gajah Mada Slawi.
Penilaian tingkat kerentanan air tanah terhadap pencemaran dengan menggunakan metode SINTACS dan metode DRASTIC di Kecamatan Sumobito Kabupaten Jombang
Most residents of Sumobito District still use groundwater as their raw water source through dug wells. Groundwater in this area is potentially vulnerable to pollution. This can happen because of the increasing number of industrial and household waste, as well as the use of pesticides on rice fields, which triggers the emergence of potential sources of pollution for ground water. This research aims to identify the location distribution of groundwater vulnerability levels. Identification was carried out at 23 dug well points that had been determined for 5 months. The methods used in this research are the SINTACS method and the DRASTIC method with 7 hydrogeological parameters each. The results of this research are dominated by rather high vulnerability which tends to be in the western and southern parts of the research location with an area of ​​17.43 km2 to 39.66 km2 for the SINTACS method. Meanwhile, the DRASTIC method is dominated by moderate vulnerability which tends to be in the eastern and southern parts of the research location with an area of ​​46.79 km2 to 47.20 km2. Sustainable groundwater protection planning with a land conservation perspective is the right step to prevent contamination of groundwater from pollutant sources.
Pengembangan Kawasan Wisata Pantai Tetezeu Berbasis Analisis Daya Dukung Yang Berkelanjutan
Tetezeu beach is an alternative for ocal peopleor tourists from outside the area. Tetezeu beach has attractions in the form of a recreation park, beautiful sloping sandy beaches gazebos, jogging spots and restaurants. Even though this tourist attraction is a favorite of local tourists, the development of this area is still not oprimal. To optimize a tourist area, one aspect that must be considered is the carrying capacity of the existing area so that it can be developed further. Tourism can be sustainable. The aim of this research is to determine the characteristics of the Tetezeu beach tourist area. The carrying capacity of the Tetezeu beach tourist area and the sustainable development of beach tourism at Tetezeu beach. Data collection methods in this research used interviews, observation, documentation, literature studies and related agencies. The analytical method used is mix methodes analysis with carrying capacity analysis techniques as wall as EFAS and IFAS analysis techniques for strategic sustainable development of tourist areas. Theses results indicate that the carrying capacity in the Tetezeu beach tourism area is included in the carrying capacity classification as being exceeded, with the general recommendation being that the Tetezeu beach tourism area must be controlled and organized. The control in question is controlling the number of tourist visits because the number of real visits is vey large when compared with the calculated value of carrying capacity, real and effective carrying capacity. This large number of visits certainly has a big impact on the ecology
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Analisis Produktivitas Produksi Knuckle Steering Departemen Machining Menggunakan Metode Objective Matrix
A company must be able to maximize the productivity of all its activities. One of them is productivity in the knuckle steering item production line, where the number of orders always increases every month. Therefore, companies need to measure productivity which in turn can create more effective and efficient company activities. The method used is Objective Matrix (OMAX). The results of this study are that the lowest productivity is in September with a productivity value of 23.6 and the highest productivity is in month 4 with a value of 517.2. The lowest ratio is found in ratio 1, namely the level of production achievement against machine hour capacity. The productivity value is only 28 of the 132 total total productivity values. This happens because of various factors, namely unprofessional operators, minimal experience operators, lack of machine maintenance so that it often breaks, long production processes, and many defective materials from the Foundry dept. Efforts that can be made to improve this ratio include optimizing the supervisory function on employee performance, maintaining production machines so that they have productive conditions in producing products, and increasing employee motivation.
Evaluasi Kondisi Dan Tingkat Risiko Sanitasi Permukiman Di Kecamatan Magersari Kota Mojokerto
Magersari Subdistrict is one of the subdistricts located in Mojokerto City which has a risk area for domestic wastewater, household waste and environmental drainage. The method used in this study is descriptive qualitative and quantitative with data collection techniques used in this study, namely observation and questionnaire results in residential areas. The purpose of this study was to determine the condition and risk level of the current settlement sanitation in Magersari District, Mojokerto City. The results of the analysis obtained through the questionnaire were then calculated using the Likert scale index. It can be seen that the Balongsari Village has sufficient criteria with an interval of 60.66% - 65.16%, while the Magersari Village has sufficient criteria with an interval of 60.31% - 64.8% , and Kedundung Village has sufficient criteria with an interval of 61.31% - 68.68%. Based on the results of the analysis obtained by Magersari District, until now it still has sufficient sanitation facilities and infrastructure to meet the needs of its people, but it is necessary to improve the quality of waste facilities that have been damaged.