Advanced Feature Engineering

[levelslip]

• Description: Engineer domain-specific features for modeling
• Activities:
  • Temporal features:
    • Hour of day (0-23)
    • Day of week (Monday=0, Sunday=6)
    • Is_peak_hour (boolean: 1 if 9-12 or 2-5, 0 otherwise)
    • Is_weekend (boolean: 1 if Saturday/Sunday)
    • Is_morning (boolean: 1 if 6-12, 0 otherwise)
    • Time_to_peak (minutes until next peak hour)
  • Queue features:
    • Current queue length at arrival
    • Average queue length at same time yesterday
    • Queue trend (increasing, stable, decreasing)
    • Queue velocity (patients served per hour)
    • Estimated time to clear queue
  • Doctor features:
    • Doctor efficiency score (avg service time)
    • Doctor availability (% free)
    • Doctor fatigue indicator (hours worked)
  • Department features:
    • Department average service time
    • Department average wait time at time
    • Department capacity utilization
    • Department workload (total patients)
  • Patient features:
    • Is_returning_patient (boolean)
    • Insurance type (categorical)
    • Patient history (avg service time for this patient)
  • Derived features:
    • Ratio features (queue_length / doctor_count)
    • Interaction features (peak_hour × high_queue)
  • Feature scaling and normalization:
    • Standardize numeric features (zero mean, unit variance)
    • Encode categorical features
    • Handle skewed distributions
  • Document feature engineering decisions
• Deliverables: Engineered features dataset, feature documentation