# Core optimization and data processing
ortools>=9.0.0
pandas>=1.5.0
numpy>=1.21.0

# Web interface
streamlit>=1.28.0
plotly>=5.0.0

# Data processing
openpyxl>=3.0.0
xlrd>=2.0.0
python-dateutil>=2.9.0
PyYAML>=6.0.0

# Optional: Enhanced visualization (install with: pip install -e .[viz])
# networkx>=2.8.0