The articles in this issue were authored/co-authored by authors from Universitas Pertamina and Universitas Borneo Tarakan.

This issue of JESCEE (Vol. 2 No. 1, 2023) delivers insightful research and practical methodologies spanning supply chain optimization, energy systems analysis, and process engineering innovations. Featured articles apply established and novel techniques to address pertinent industry challenges. Highlights include:

• Lean Manufacturing Implementation: Applying the DMAIC methodology to identify root causes (e.g., operator factors affecting robot teaching) and minimize specific welding defects (torn pipe lower jig B) in a transportation equipment manufacturing setting.
• Electrical Distribution Network Assessment: Analyzing voltage drops in low-voltage feeders using field measurements and ETAP software simulations, comparing findings against SPLN standards for network reliability.
• FMCG Reverse Logistics Analysis: A bibliometric study exploring trends, environmental considerations, and the role of logistics providers in the reverse logistics chain for Fast-Moving Consumer Goods.
• Risk-Informed Infrastructure Planning: Utilizing AHP and MCLP for optimal dry port location selection for Tanjung Intan Port, explicitly incorporating tsunami risk assessment alongside logistical criteria.
• Power System Maintenance Optimization: Investigating strategies for optimizing maintenance schedules on medium voltage overhead lines to reduce Energy Not Supplied (ENS).
• Advanced Materials Synthesis: Detailing a one-step hydrothermal synthesis process for producing Nickel-doped TiO2 nanotubes.
• Natural Product Extraction Technology: Exploring the use of Ultrasound Assisted Extraction for obtaining flavonoids from papaya seeds and evaluating their Sun Protection Factor (SPF) value.

This edition underscores JESCEE's dedication to sharing valuable research that drives practical improvements and innovation in diverse fields of engineering and logistics.