The Base predictions and Reconciliation sections don't have a complete explanation of the hierarchical reconciliation methodology. Ideas to improve those sections:

Base predictions:

• Define what we mean by "base predictions".
• Use a different model. By construction, the Naive model is coherent, so this model does not well motivate the use of hierarchical reconciliation. In particular, RandomWalkWithDrift could work.

Reconciliation

• Show that the base forecasts are not coherent, using plot_hierarchical_predictions_gap (fix [BUG] plot_hierarchical_predictions_gap is not general enough #85 first).
• Explain the methods used for reconciliation. In this case, the explanation for BottomUp is missing.