This preliminary study was conducted to provide a literature review about applications of theory of planned behavior and health belief model. These theories have been widely used to explain and predict a person's health-related intention and behavior. Health belief model as well as theory of planned behavior remain the best known theories in health behavior research. The health belief model suggests people's belief about health problems in order to reduce or prevent the chance of disease whereas the theory of planned behavior is about predicting a person's intention or behavior. In this study, we systematically selected and reviewed articles related to the application of theory of planned behavior and health belief model, particularly to its implementation in observing public health behavior. The aim was to identify the implications of theory of planned behavior and health belief model in behavioral health-related research and identify a potential research gap by using these two theories. Our analysis revealed that in Indonesia there were less studies which integrated extension of theory of planned behavior and health belief model, especially in evaluating factors affecting the public behavior from prevention of COVID-19. This study could be a basis of further studies which integrate extended theory of planned behavior and health belief model in investigating public behavior during the pandemic of COVID-19 in Indonesia.

The Indonesian roof tile manufacturing industry relies heavily on manual operations, specifically in transportation and inspection processes, which creates multiple issues, such as fatigue, injuries, human error, and reduced productivity. Various industries in the Indonesian industrial landscape have begun embracing a problem-solving approach known as the theory of inventive problem-solving (TRIZ) to mine solutions for industrial issues. Nevertheless, its application in the Indonesian roof tile manufacturing industry remains unaddressed. The study aims to solve manual handling issues in the roof tile manufacturing industry using TRIZ. Three observations were outlined from manual roof tile transportation and inspection, followed by the formulation of engineering contradictions (ECs). The ECs were linked with system parameters, which were used as indicators within the contradiction matrix to extract inventive principles as solution models for conceptual development. The concept included an automated system with a conveyor belt (#15: dynamics) for effective transportation, automated image capture (#28: mechanics substitution) for effective inspection, and a flipping conveyor (#25: self-service) to eliminate manual contact. Although the study addressed several issues stemming from manual operations, mechanical analysis, prototyping, and usability testing still require improvements.

PT. XYZ is a manufacturing company that produces various types of metal-based products with a make to order system. One of them is the Back Top Plate 450/456 (BTP 450/456) part which is a component of refrigerators. In the period of February-November 2020, PT. XYZ produces 15,395 units of BTP 450/456. However, BTP 450/456 products have the highest percentage of defective products. The average percentage of defective products is 3.06%, while the tolerance for the number of defects determined by the company is 1%. This indicates a problem in the production process. The most types of defects in the production process of 450/456 are broken with a percentage of 41.88%. Based on Critical to Quality, the process stages that do not meet the requirements in the drawing process can cause various types of defects, such as wrinkles, breaks, miss-sizing, process failures, scratch and dents. The Fault Tree Analysis method is used to identify the root cause of the type of broken defect. The root of these problems includes the absence of a guide for setting dies, the machine being operated for a long time, operator negligence, and the incorrect position of the plastic. The proposed improvement given are determining the optimal engine pressure, designing dies setting guides for operators, evaluating and improving the maintenance process, analyzing new machine requirements, supervisors giving good directions to operators, periodic work evaluations to assess operator performance, designing visual displays as reminders for operators, and designing aids for positioning plastics on materials.

This study investigated the failure of the Blank Holder Force (BHF) control in the outside bracket for the front seat. The production process involved progressive dies consisting of nine stations: first pierce, first trim, second trim, idle, flange, idle, second pierce, idle, and parting. However, at the 7th-9th station, the pilot hole in the product deforms into an oval shape, which is undesirable. Gemba-Kaizen methods were used in this study, and primary data were collected by comparing the design and actual progressive dies. The results showed that product defects are primarily caused by an unbalanced BHF and inadequate piercing clearance. A uniform distribution of force during the forming process is obtained by reducing the spring number on the blank holder. This reduces the force generated during the process. Furthermore, the die clearance was increased from 0.01 mm to 0.1 mm, making press and die alignment less critical and requiring less cutting and stripping forces

Pematangan opak ketan secara manual memerlukan cukup banyak tungku dan tenaga kerja untuk mengejar target penjualan, maka teknologi mesin pematangan opak ketan dengan metode roller dapat menjawab permasalahan pematangan opak ketan, guna meningkatkan produktivitas opak ketan matang. Desain teknologi ini, fokus perhatian ditujukan pada pengrajin opak ketan, selain keterbatasan lahan, tenaga kerja dan soal higienis yang dihadapi industri kecil ini, kecepatan, kualitas dan berkesinambungan proses pembuatan opak ketan dapat dijamin, sehingga para pengrajin bisa memenuhi permintaan yang tinggi. Pembuatan, ujicoba dan analisis kinerja mesin pematangan opak ketan sistem roller media pematangan memanfaatkan pasir panas, terbukti menghasilkan opak ketan yang berkualitas dan kuantitasnya meningkat secara signifikan dibandingkan menggunakan alat tradisional, sehingga proses pembuatan opak ketan bisa dilakukan dengan memanfaat teknologi tepat guna hasil inovasi dengan tetap menjaga kualitas dan dapat meningkatkan produktivitas, proses produksi tidak dibatasi oleh ketrampilan karyawan dan waktu sehingga permintaan pelanggan dapat terpenuhi.