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All Journal Jurnal Indonesia Sosial Teknologi Journal Research of Social Science, Economics, and Management
Iriani , Yani
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Computer Science & IT Economics, Econometrics & Finance Environmental Science Law, Crime, Criminology & Criminal Justice Social Sciences

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Quality Control in Coconut Sorting Process using Statistical Process Control (SPC) and Root Cause Analysis (RCA) (Case Research: UMKM Wika Kelapa) Nugraha, Ramdan; Iriani , Yani
Journal Research of Social Science, Economics, and Management Vol. 5 No. 1 (2025): Journal Research of Social Science, Economics, and Management
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/jrssem.v5i1.960

Abstract

UMKM Wika Kelapa is a coconut shell (endocarp) supplier business in Pangandaran. The main problem faced is the high level of coconut defects, including broken coconuts, rotten coconuts, and sprouted coconuts, with an average percentage of 4.65%, exceeding the 3% tolerance limit that has been set. The high level of defects impacts business losses because defective coconuts are sold at lower prices. This research aims to determine whether quality control in the coconut sorting process is in control, identify factors causing defects, and provide suggestions for improvement to minimize coconut defects using Statistical Process Control (SPC) and Root Cause Analysis (RCA) methods. The sorting process is illustrated using the SIPOC (Supplier, Input, Process, Output, and Customer) approach. The results of SPC analysis using check sheets, histograms, Pareto diagrams, and P-Charts show that the coconut sorting process is not yet statistically controlled, with seven points outside the control limits, namely January (0.050), March (0.051), April (0.052), June (0.056), August (0.035), September (0.042), and November (0.040) during 2024. The RCA analysis using fishbone diagrams and five-whys revealed that broken coconut defects are dominantly caused by human factors, including lack of accuracy, unskilledness, and worker fatigue. Rotten coconut defects are dominantly caused by method factors, namely the absence of SOPs, resulting in prolonged storage in humid and unhygienic conditions. Sprouted coconut defects are primarily caused by method factors due to lack of SOPs or training on storage and absence of inspection protocols.
Analysis and Modeling of Queuing System Simulation in Payment Process at Minimarket (Case Study of Minimarket X Yogyakarta) Melani, Trinopi; Iriani , Yani
Jurnal Indonesia Sosial Teknologi Vol. 5 No. 5 (2024): Jurnal Indonesia Sosial Teknologi
Publisher : Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59141/jist.v5i5.998

Abstract

The purpose of this study is to analyze the queuing system at Minimarket X so as to minimize the number of queues. The method in this writing uses a discrete event simulation method with the help of Anylogic software. Simulation is used as a method to analyze problems that exist in the payment system at the Minimarket, while Anylogic software as an illustration that can facilitate the queuing system so that it is clearer and easier to understand. Observations conducted for 20 days show that the queuing system applied by Minimarket X is Multi Channel – Single Phase and First Come First Served (FCFS) or First In First Out (FIFO) with 4 cashier officers (M/M/4). Each cashier is tasked with serving customers and processing the products purchased by scanning them and packing each grocery. The average number of Minimarket visitors every day is 22 customers per hour with a queue length of 10 to 11 customers per hour, and the average waiting time for customers to be served is around 27 to 30 minutes. The simulation used through anylogic software obtained error results within 67 minutes 43 seconds.
Co-Authors Melani, Trinopi Nugraha, Ramdan