# Browse by layer

[Back to encyclopedia](index.md)

| Layer | Name | Category | Sub-layers | Axes | Options |
|---|---|---|---:|---:|---:|
| [`l0`](l0/index.md) | Study Setup | `setup` | 1 | 3 | 6 |
| [`l1`](l1/index.md) | Data | `construction` | 7 | 26 | 108 |
| [`l1_5`](l1_5/index.md) | Data summary | `diagnostic` | 6 | 13 | 50 |
| [`l2`](l2/index.md) | Preprocessing | `construction` | 5 | 15 | 58 |
| [`l2_5`](l2_5/index.md) | Pre vs post preprocessing | `diagnostic` | 5 | 12 | 42 |
| [`l3`](l3/index.md) | Feature engineering | `construction` | 4 | 1 | 52 |
| [`l3_5`](l3_5/index.md) | Feature diagnostics | `diagnostic` | 6 | 15 | 50 |
| [`l4`](l4/index.md) | Forecasting model | `construction` | 4 | 6 | 64 |
| [`l4_5`](l4_5/index.md) | Generator diagnostics | `diagnostic` | 6 | 13 | 42 |
| [`l5`](l5/index.md) | Evaluation | `consumption` | 5 | 18 | 30 |
| [`l6`](l6/index.md) | Statistical tests | `consumption` | 7 | 33 | 16 |
| [`l7`](l7/index.md) | Interpretation / importance | `consumption` | 2 | 9 | 55 |
| [`l8`](l8/index.md) | Output / provenance | `consumption` | 4 | 8 | 62 |