Employee Attrition Prediction Model: A Multidimensional Factor-Based HR Analysis System

This project is an employee attrition prediction system published by Shreya889094 on GitHub (original link: https://github.com/Shreya889094/Employee_Attrition_prediction, published on June 15, 2026). It uses machine learning to analyze multidimensional factors such as overtime hours, income level, job satisfaction, work-life balance, and tenure to predict employee turnover risk and help enterprises develop talent retention strategies. The project aims to address the limitations of traditional turnover early warning that relies on subjective judgment, enabling data-driven HR decisions.

Employee attrition is a tough problem in HR management. The replacement cost can be as high as 50%-200% of the annual salary (even higher for key positions), not to mention hidden losses such as knowledge drain and team morale decline. Traditional early warning relies on subjective judgment or simple rules, which struggle to capture complex combinations of turnover drivers. Machine learning technology can learn turnover patterns from historical data, identify high-risk employees in advance, and take targeted retention measures.

The project focuses on five key dimensions:

1. Overtime hours: Long-term overtime easily leads to work-life imbalance and unreasonable workload, which is a strong signal of turnover (moderate project-based overtime is acceptable, but long-term uncompensated overtime is highly disruptive).
2. Income level: Includes absolute salary, growth trajectory, and satisfaction. Salary is not the only key factor; it needs to be analyzed interactively with other factors.
3. Job satisfaction: Covers job content, growth opportunities, management relationships, and team atmosphere. Low satisfaction is often the "last straw" for turnover.
4. Work-life balance: Evaluates time flexibility, remote work options, leave usage, and family-friendly policies, focusing on subjective feelings and sense of control.
5. Tenure: Adaptation risks in the early stage (0-1 year), promotion needs in the bottleneck period (3-5 years), and burnout risks in the senior stage (10+ years). It needs to interact with other factors.

Data Preprocessing

Handle missing values (imputation), categorical variable encoding (one-hot/target encoding), feature scaling (standardization/normalization), and outlier processing.

Feature Engineering

Construct interaction features (e.g., overtime × salary), ratio features (current salary ÷ entry salary), trend features (satisfaction changes), and relative features (salary percentile).

Model Selection

Binary classification algorithms: Logistic Regression (strong interpretability), Random Forest (captures non-linearity and interactions), Gradient Boosting Trees (high accuracy), SVM (high-dimensional space), Neural Networks (large-scale data).

Model Evaluation

Since turnover is a rare event, focus on recall (identifying true turnover cases), precision (accuracy of high-risk predictions), F1 score, AUC-ROC, and lift curve.

Risk Stratification Intervention

• High risk (>70%): Immediate supervisor conversation and targeted solutions;
• Medium risk (30%-70%): Regular follow-up and preventive measures;
• Low risk (<30%): Maintain status quo and continuous monitoring.

Personalized Strategies

• Compensation-driven: Salary adjustment, bonuses;
• Development-driven: Training, promotion paths;
• Balance-driven: Flexible arrangements, leave policies;
• Management-driven: Supervisor replacement or management training.

System Improvement

Identify problematic departments, optimize recruitment standards, improve onboarding experience, and refine research mechanisms.

Privacy and Fairness

• Data security: Encryption and access control;
• Transparency: Whether employees are aware of algorithmic evaluation;
• Algorithmic fairness: Avoid group bias;
• Decision-making power: Algorithms assist human decisions.

Self-fulfilling Prophecy

Employees who know they are labeled as high-risk may change their behavior, so communication needs to be cautious.

Dynamic Adaptation

Models need regular retraining to adapt to environmental changes (e.g., popularization of remote work).

• NLP: Integrate open text and exit interview records to extract emotions and themes;
• Network analysis: Capture the "turnover contagion" effect in employee social networks;
• Time series modeling: Use survival analysis/RNN to predict turnover time;
• Causal inference: Identify effective intervention measures (not just correlations).

This project demonstrates the practical application of machine learning in HR. By predicting turnover risk through multidimensional factors, it provides data support for talent retention. For learners, it is a high-quality case combining classification modeling and business scenarios; for HR practitioners, it enables a shift from experience-driven to data-driven decision-making. However, technology needs to be combined with humanistic care, and translating algorithmic insights into effective employee care actions is the key to success.