| 1. MSSA (13.50) | |
| Multivariate SSA for shared-structure decomposition across channels. | |
| reasons: maturity:flagship, shared_multivariate, accuracy_shortlist, multivariate_accuracy_bonus | |
| 2. STDR (11.75) | |
| Robust seasonal-trend decomposition for noisier periodic signals. | |
| reasons: maturity:flagship, native_backed, channelwise_multivariate, accuracy_shortlist, long_series_native | |
| 3. STD (9.25) | |
| Fast seasonal-trend decomposition with dispersion-aware diagnostics. | |
| reasons: maturity:flagship, native_backed, channelwise_multivariate, long_series_native | |