International Journal of Eco-Innovation in Science and Engineering (IJEISE)

The Effect of Total Quality Management on Service Quality, Price, and Customer Satisfaction at Kita-Kita Tour and Travel

Isna Nugraha — 2024-11-30

This study aims to analyze the effect of Total Quality Management (TQM) implementation on service quality and price and its impact on customer satisfaction at Kita-Kita Tour and Travel. This study uses a quantitative method with a casual associative approach to measure service quality variables (X1), price (X2), and customer satisfaction (Y). Data was collected through questionnaires distributed to consumers who have used Kita-Kita Tour and Travel services, and was analyzed using SPSS software. Data that meets the validity, reliability, and classical assumption tests are then processed to produce a linear regression equation. The results of the analysis show that service quality and price partially and simultaneously have a positive and significant effect on customer satisfaction, so the hypothesis is accepted. The reliability test resulted in a Cronbach's Alpha value of 0.864, indicating that the data obtained is reliable. Based on this research, it shows that the implementation of TQM has a positive impact on service quality and price, which in turn increases customer satisfaction.

Implementation of Validity and Reliability Tests on Service Satisfaction Levels of the Spotify Application Using SPSS Software

Kinanti Resmi Hayati — 2024-11-30

Spotify is a legal digital music application widely used for online streaming, especially popular among students. This popularity provides a solid foundation for conducting a case study on user satisfaction levels with Spotify in Indonesia. The research employs a questionnaire to collect data, which is subsequently tested for validity and reliability using SPSS software. The results indicate that several variables, such as improved user experience, user-friendly interface, useful features, and fast performance, have high validity values, with significance levels below 0.05. These variables exceed the r-table, with values ranging from 0.5 to 0.904. In cases where any variable is found invalid, retesting will be conducted to ensure the data is valid. Reliability testing produced a Cronbach's alpha coefficient of 0.772, demonstrating that the data used in this study is reliable, as it exceeds the acceptable threshold of 0.6. Therefore, this research provides valuable insights into user satisfaction levels regarding Spotify's services in Indonesia, making it a trustworthy resource for understanding user experiences and areas for improvement within the application. Overall, the findings contribute to a deeper understanding of user preferences and satisfaction in the digital music streaming landscape.

Effect of Fosroc Cebex-100 and Fly Ash Stabilization on the Microstructural Properties of Soft Soil

Himatul Farichah — 2024-11-30

This study investigates the microstructural effects of stabilizing soft soil using fly ash and Fosroc Cebex-100. The soft soil used in this study was collected from the construction site of the Northern Ring Road (JLU) Section 1 in Lamongan regency. Firstly, a series of laboratory soil test was performed to obtain the index properties of the soil sample including unit weight, specific gravity, Atterberg’s limits, optimum moisture content, and maximum dry unit weight. The soil was then treated with three variations of fly ash (20%, 25%, and 30%), while the Fosroc Cebex-100 dosage was held constant at 0.45% of the fly ash weight. A CBR test indicated that a 20% fly ash and Fosroc Cebex-100 mixture achieved the highest CBR value. Consequently, this optimal mix was selected for SEM-EDX (Scanning Electron Microscopy - Energy-Dispersive X-ray Spectroscopy) analysis to further examine microstructural characteristics. Additional fly ash and Fosroc Cebex-100 to the soft soil will influence the microstructural properties of the soil. SEM analysis show that addition of fly ash and Fosroc Cebex-100 results in significant changes in the soil matrix, including increased particle bonding, reduced porosity, and a denser overall structure. Moreover, the addition of fly ash and Fosroc Cebex-100 contribute to the presence of iron (Fe) in the treated soil.

Mini-Review on Renewable Production of Green p-Xylene

Raka Selaksa Charisma Muchammad — 2024-11-30

The sustainable and renewable production of p-xylene (PX), a crucial component for polyethylene terephthalate (PET), is increasingly important as an alternative to fossil-based processes. This review examines biomass-derived routes for PX synthesis, emphasizing the use of bio-px production pathways to feasible for commercialization. While bio-PX production offers reduced greenhouse gas emissions, challenges remain in cost, catalyst stability, and energy requirements. Recent innovations in catalyst regeneration and hierarchical structures enhance stability and minimize coke formation. Life-cycle assessments confirm bio-PX’s environmental advantages, suggesting that further research into biomass sources and catalyst efficiency will advance bio-based PX production toward commercial viability in a sustainable bioeconomy.

Risk Identification and Management Analysis at Company X Using FMEA and EPQ Methods

Mega Cattleya P. A Islami — 2024-11-30

This study aims to identify and manage risks in Company X’s instant noodle production process using Failure Mode and Effects Analysis (FMEA) and Economic Production Quantity (EPQ) methods. FMEA is used to analyze potential failure modes, while EPQ optimizes production quantities to minimize storage and overproduction costs. The research identifies key risks such as overproduction, machinery failures, and packaging defects. Data collected includes production volumes, raw material usage, and defect rates. FMEA reveals that overproduction is the primary risk, leading to high storage costs. EPQ calculations are performed to determine the optimal monthly production for three instant noodle variants, resulting in significant cost savings. The study concludes that implementing EPQ alongside FMEA minimizes risks and reduces inventory management costs, highlighting the importance of systematic risk management in production optimization. This approach helps Company X enhance efficiency while cutting purchasing and costs expenses by Rp. 3,900,000.00 per month.

Review Paper on the Level of Road Surface Damage in Mataram City

Aulia Dewi Fatikasari — 2024-11-30

In Mataram City, the capital of West Nusa Tenggara Province, many road sections have deteriorated, reducing road comfort, safety, and mobility efficiency. Typical forms of road damage, such as cracks, potholes, deformation, and surface wear, demand regular maintenance and repairs to extend road service life. This situation underscores the need for a thorough mapping of road pavement damage to provide a comprehensive overview of the road network’s condition and to support effective maintenance planning. The mapping of pavement damage in Mataram City is also expected to inform more effective decision-making in road management. This study aims to review previous research on pavement damage mapping and apply the findings to road sections in Mataram City. This empirical, data-driven approach is anticipated to provide a thorough perspective on pavement conditions and serve as a foundation for the local government’s efforts to create more effective and efficient road maintenance policies. This study employs a systematic literature review approach to analyze and synthesize existing research regarding pavement damage in road sections using the PCI and Binamarga Methods on Mataram City roads. This study is classified as qualitative research, focused on extracting and synthesizing information from academic papers. Based on the research results from several journal reviews, in the city of Mataram,, several roads still experience visual damage to the pavement surface, including cracking, depression, patching and utility cut patching, and potholes. In addition, the results show that several roads experience fair-level damage based on the PCI method, and some have less than 50% damage to the road surface based on the Binamarga method

Optimization of Nano-Hydroxyapatite Production from Limestone with Effect of Gelatin Concentration and pH in Sol-Gel Synthesis

Sutiyono S — 2024-11-30

Nano hydroxyapatite is one of the biomaterials that has proven to be a very potential material due to its ability to bind directly with bone tissue. Limestone with a calcium carbonate content of 99.87% was used as a calcium source for the economical and sustainable synthesis of hydroxyapatite. The sol-gel method was chosen for the in situ gelatin synthesis process due to its ability to produce nanoparticles with high homogeneity. The particle size of nanohydroxyapatite can increase the surface area to volume ratio thus affecting the interaction with surrounding cells and tissues. Gelatin was added in various concentrations of 10%, 20%, and 30% as an innovative cell growth support modifier. The synthesis was also carried out at pH 9, 10, and 11 to evaluate its effect on hydroxyapatite formation. Optimal synthesis conditions were obtained at 30% gelatin concentration and pH 10, which resulted in the highest yield of 93.95%. Product characterization included Fourier Transform Infra-Red analysis, which showed the presence of typical hydroxyapatite functional groups (PO₄³-, OH-) and carbonate groups (CO₃²-). Scanning Electron Microscopy characterization showed nano-sized particles in the range of 443-578 nm with a granular structure. Porosity was found to be 72.52% making it ideal for cancellous bone tissue engineering applications.