This study aims to analyze the optimization of seaweed seedling inventory management using the Economic Order Quantity (EOQ) method to enhance cost efficiency for farmers in Tarakan City. The research employs a quantitative descriptive approach, integrating EOQ with forecasting techniques (Moving Average and Exponential Smoothing) to predict raw material needs accurately. Data were processed using Microsoft Excel and POM-QM for Windows to ensure precision. The results indicate that EOQ yields an optimal order quantity of 878 ropes per order, with a frequency of 6 orders per year, a reorder point of 16 ropes, and a total inventory cost (TIC) of IDR 842,681. Compared to traditional methods (TIC IDR 2,132,083), EOQ reduces costs by 60.5%. Forecasting analysis reveals that Exponential Smoothing (MAPE 19.67%) outperforms Moving Average (MAPE 22.5%) in accuracy. These findings highlight EOQ’s effectiveness in minimizing waste, preventing stockouts, and improving productivity. The study provides practical insights for coastal small-scale farmers and policymakers in the marine sector.

This research aims to evaluate the effectiveness of the Al-Qur'an learning program implemented in Dusun 1, Riak Siabun I Village. The focus of this research is to assess how the program can improve children's understanding of makhrojul letters and tajwid, as well as identifying factors factors that influence the success or obstacles in its implementation. This method of service is a persuasive method for study participants. The use of this method is considered suitable for subtly inviting or encouraging the general public to take part in an activity. The results of this research show that there are several children who have not mastered the pronunciation of the letters of the Koran and recitation of the Koran well. Apart from that, in this village there is still a lack of facilities and infrastructure as well as teaching staff for Al-Qur'an learning. Based on these findings, we then held a learning program to recite the Koran to improve the understanding of makhrojul letters and tajwid among children in hamlet 1, Riak Sibun 1 village, Sukaraja sub-district, Seluma district.