Web-Based CRM System with Non-Preemptive SJF Scheduling and WhatsApp Notifications for Clothing Alteration MSMEs

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Wahyu Firmansyah
Ahmad Habib

Abstract

Digital transformation has become a key strategy for enhancing operational efficiency and service quality in Micro, Small, and Medium Enterprises (MSMEs). However, clothing alteration MSMEs continue to face challenges in customer management, order recording, and service queue management due to the absence of an integrated system. This study develops a web-based Customer Relationship Management (CRM) system that integrates Non-Preemptive Shortest Job First (SJF) scheduling with automated WhatsApp notifications. The research employs the Research and Development (R&D) method using the Waterfall System Development Life Cycle (SDLC) model, with data collected through observations, interviews, and a literature review. The proposed system integrates customer, order, and SJF-based queue management with real-time service notifications. Evaluation results indicate that the proposed SJF scheduling method reduced the Average Waiting Time (AWT) from 9.8 hours to 4.0 hours and the Average Turnaround Time (ATT) from 13.4 hours to 7.6 hours compared with the First Come First Served (FCFS) method. In addition, the system achieved a 90% WhatsApp notification delivery success rate and an 84.22% User Acceptance Testing (UAT) score, indicating that it enhances service quality, strengthens customer communication, and improves service queue management for clothing alteration MSMEs.

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