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Limitations

  • The thesis dataset contains only 75 dates per year and eight categories; conclusions should not be generalized to large or multi-echelon supply chains.
  • Publication rights for the source sales data are unconfirmed, so reproducible public examples use synthetic data rather than the original observations.
  • Weather can improve or degrade forecasts depending on category. The ablation is empirical and cannot establish a causal effect.
  • Rule count grows exponentially with input count. The six-input weather model permits up to 64 rules even with only two membership functions per input.
  • The reference EFS training path depends on licensed MATLAB toolboxes. The independent Python IT2 backend removes that runtime dependency but is not a claim of numerical equivalence to MathWorks' interval type-2 implementation.
  • Both EFS backends can be substantially slower than simple statistical baselines in the full three-seed optimization profile.
  • LSTM estimates are unstable on very small datasets; multiple seeds and uncertainty summaries are required.
  • The current system retrains in batches. It does not yet evolve online, consume live streams, optimize inventory decisions, or forecast multiple supply-chain echelons.
  • The Streamlit application is a local research interface, not a hardened multi-user production service.