End-to-End Credit Risk Prediction System: A Complete Practice of Machine Learning and Visualization Dashboard

This article introduces a complete household credit default risk prediction project that integrates machine learning modeling, Power BI visualization, Streamlit interactive interface, and automated pipelines, demonstrating a full-stack solution in the field of financial risk control. The project covers the entire process from data preparation to production deployment, aiming to solve the risk assessment challenges for customer groups with sparse credit data in inclusive finance.

Household credit business targets groups lacking traditional credit records and is an important part of inclusive finance. Due to the sparse credit data of the customer group, traditional credit scoring methods are difficult to apply, leading to high default risks. Accurately predicting default probability is not only related to the asset quality of institutions but also affects the accessibility of financial services—conservative strategies exclude potential customers, while aggressive strategies lead to a rise in bad debts. Therefore, building an accurate model is the key to the sustainable development of inclusive finance.

The project architecture includes a data layer (multi-source data integration, cleaning, feature engineering), a modeling layer (training of multiple ML algorithms), a visualization layer (Power BI dashboard, Streamlit application), and an automation layer (pipeline orchestration). Feature engineering builds a multi-dimensional system: customer profile (age, income, etc.), behavioral features (repayment records, number of overdue instances), aggregated features (time window statistics), and ratio features (debt-to-income ratio, etc.).

For the characteristics of imbalanced data, SMOTE oversampling/undersampling is used to balance the training set; class weights are adjusted or focal loss is applied to focus on default samples; evaluation metrics focus on AUC-ROC, AUC-PR, KS, etc.; SHAP values are used to analyze feature importance to ensure transparent and compliant decision-making.

The Power BI dashboard provides functions such as risk overview, model monitoring, customer segmentation, and real-time early warning to support management decisions. The Streamlit application is for business personnel: single customer query (default probability, risk level), batch scoring, feature explanation, scenario simulation (what-if analysis).

The automated pipeline includes data update (scheduled pull of incremental data), model retraining (triggered when performance degrades/data drifts), report generation (regular distribution), and version management (traceability of data/code/models). Technology stack: Python ecosystem (scikit-learn, XGBoost), Power BI, Streamlit, automation tools (Airflow/Prefect), balancing functionality and cost.

This project demonstrates the complete practice of credit risk prediction from data to deployment. Its value lies in the deep integration of data science and business scenarios (connecting decision-making layers, empowering business ends, and automated operation and maintenance). It provides a reproducible template for learners and architectural reference significance for financial institutions.