Design and Development of a Web-Based Digital Credit Service and QRIS Transaction System (OpenAlex (recherche mondiale))

Summary

• The PayQRIS system achieved a System Usability Scale (SUS) score of 83.25, indicating high usability.p.1
• Maximum initial credit limits are capped at 30% of a user's monthly income based on OJK Circular Letter Number 19/SEOJK.06/2023.p.7
• The platform applies an interest rate of 0% for the 1 Month installment tenor option.p.9
• Installment tenors of 3 Months, 6 Months, and 12 Months carry an applied interest rate of 2.95%.p.9
• Late payments automatically incur a penalty rate of 0.1% per calendar day of the outstanding bill.p.10
• Security rules lock transaction verification for 5 minutes after 3 consecutive incorrect PIN attempts.p.5

Key insights

1. PayQRIS integrates web-based PayLater digital credit services with QRIS payments into a single platform without direct cash disbursement.p.1
2. System architecture and features were developed iteratively following the five stages of the Prototyping software engineering model.p.3
3. Initial user credit limits are calculated automatically based on monthly financial income up to a 30% ceiling.p.7
4. Monthly installment repayments are calculated using the flat-rate interest method across available tenors.p.9
5. Overdue bill payments automatically accumulate daily penalties calculated at 0.1% of the total unpaid balance.p.10
6. Usability evaluation via SUS yielded a score of 83.25, placing the system in Grade B with an Excellent adjective rating.p.12