diff --git a/scripts/flux.py b/scripts/flux.py
index e2e5e58..5643623 100644
--- a/scripts/flux.py
+++ b/scripts/flux.py
@@ -36,16 +36,43 @@ class CSVSource(Source):
         return pd.read_csv(filepath, **self.options)
 
 
+class Transformation(BaseModel):
+    function: Callable
+    extra_kwrds: dict = {}
+
+
 class Destination(BaseModel):
     name: str
 
+    def write(
+        self, df: pd.DataFrame, dest_path: Path, writing_func: Callable
+    ) -> list[Path]:
+        dest_basename = dest_path / self.name
+        return [writing_func(df, dest_basename)]
+
+
+class SplitDestination(Destination):
+    split_column: str
+
+    def write(
+        self, df: pd.DataFrame, dest_path: Path, writing_func: Callable
+    ) -> list[Path]:
+        wrote_files = []
+
+        for col_value in df[self.split_column].unique():
+            filtered_df = df[df[self.split_column] == col_value]
+
+            dest_basename = dest_path / f"{self.name}-{col_value}"
+            dest = writing_func(filtered_df, dest_basename)
+            wrote_files.append(dest)
+
+        return wrote_files
+
 
 class Flux(BaseModel):
     sources: list[Source]
-    transformation: Callable
-    extra_kwrds: dict = {}
+    transformation: Transformation
     destination: Destination
-    split_destination: str = ""
 
 
 def to_csv(df, dest_basename: Path) -> Path:
@@ -112,18 +139,8 @@ def consume_fluxes(
             df, duplicated = split_duplicates(df, str(filename), duplicated)
             src_df.append(df)
 
-        df = flux.transformation(src_df, **flux.extra_kwrds)
+        df = flux.transformation.function(src_df, **flux.transformation.extra_kwrds)
 
-        if flux.split_destination:
-            files = write_split_by(
-                df=df,
-                column=flux.split_destination,
-                dest_path=dest_path,
-                name=flux.destination.name,
-                writing_func=writing_func,
-            )
-        else:
-            dest_basename = dest_path / flux.destination.name
-            files = [writing_func(df, dest_basename)]
+        files = flux.destination.write(df, dest_path, writing_func)
         wrote_files += files
     return wrote_files
diff --git a/scripts/gold_mart.py b/scripts/gold_mart.py
index 37d6007..450b789 100644
--- a/scripts/gold_mart.py
+++ b/scripts/gold_mart.py
@@ -4,7 +4,14 @@ from pathlib import Path
 
 import pandas as pd
 
-from scripts.flux import CSVSource, Destination, Flux, consume_fluxes
+from scripts.flux import (
+    CSVSource,
+    Destination,
+    Flux,
+    SplitDestination,
+    Transformation,
+    consume_fluxes,
+)
 
 logger = logging.getLogger(__name__)
 logger.setLevel(logging.DEBUG)
@@ -54,9 +61,8 @@ if __name__ == "__main__":
     lot_fluxes = {
         "Lots": Flux(
             sources=[CSVSource(filename="CRG/crg-*.csv")],
-            transformation=build_lots,
-            destination=Destination(name="Lot/lot"),
-            split_destination="Lot",
+            transformation=Transformation(function=build_lots),
+            destination=SplitDestination(name="Lot/lot", split_column="Lot"),
         ),
     }
     years = list(range(2017, 2024))
diff --git a/scripts/history_stagging.py b/scripts/history_stagging.py
index 408a6a7..a3d7645 100644
--- a/scripts/history_stagging.py
+++ b/scripts/history_stagging.py
@@ -5,7 +5,7 @@ import pandas as pd
 
 from scripts.flux import consume_fluxes
 
-from .flux import Destination, ExcelSource, Flux
+from .flux import Destination, ExcelSource, Flux, SplitDestination, Transformation
 
 logger = logging.getLogger(__name__)
 logger.setLevel(logging.DEBUG)
@@ -124,28 +124,31 @@ FLUXES = {
                 sheet_name="Catégories",
             ),
         ],
-        transformation=trans_2017_2021,
-        extra_kwrds={"stagging_columns": STAGGING_COLUMNS},
-        destination=Destination(name="crg"),
-        split_destination="Année",
+        transformation=Transformation(
+            function=trans_2017_2021,
+            extra_kwrds={"stagging_columns": STAGGING_COLUMNS},
+        ),
+        destination=SplitDestination(name="crg", split_column="Année"),
     ),
     "2022 - charge.xlsx": Flux(
         sources=[
             ExcelSource(filename="2022 - charge.xlsx", sheet_name="Sheet1"),
         ],
-        transformation=trans_2022_charge,
-        extra_kwrds={"stagging_columns": STAGGING_COLUMNS},
-        destination=Destination(name="crg"),
-        split_destination="Année",
+        transformation=Transformation(
+            function=trans_2022_charge,
+            extra_kwrds={"stagging_columns": STAGGING_COLUMNS},
+        ),
+        destination=SplitDestination(name="crg", split_column="Année"),
     ),
     "2022 - locataire.xlsx": Flux(
         sources=[
             ExcelSource(filename="2022 - locataire.xlsx", sheet_name="Sheet1"),
         ],
-        transformation=trans_2022_loc,
-        extra_kwrds={"stagging_columns": STAGGING_COLUMNS},
-        destination=Destination(name="crg"),
-        split_destination="Année",
+        transformation=Transformation(
+            function=trans_2022_loc,
+            extra_kwrds={"stagging_columns": STAGGING_COLUMNS},
+        ),
+        destination=SplitDestination(name="crg", split_column="Année"),
     ),
     "2023 - charge et locataire.xlsx": Flux(
         sources=[
@@ -154,10 +157,11 @@ FLUXES = {
                 sheet_name="DB CRG 2023 ...",
             ),
         ],
-        transformation=trans_2023,
-        extra_kwrds={"year": 2023, "stagging_columns": STAGGING_COLUMNS},
-        destination=Destination(name="crg"),
-        split_destination="Année",
+        transformation=Transformation(
+            function=trans_2023,
+            extra_kwrds={"year": 2023, "stagging_columns": STAGGING_COLUMNS},
+        ),
+        destination=SplitDestination(name="crg", split_column="Année"),
     ),
 }
 
diff --git a/scripts/stagging_gold.py b/scripts/stagging_gold.py
index 937298c..0886d04 100644
--- a/scripts/stagging_gold.py
+++ b/scripts/stagging_gold.py
@@ -4,7 +4,7 @@ from pathlib import Path
 
 import pandas as pd
 
-from scripts.flux import CSVSource, Destination, Flux, consume_fluxes
+from scripts.flux import CSVSource, Destination, Flux, Transformation, consume_fluxes
 
 logger = logging.getLogger(__name__)
 logger.setLevel(logging.DEBUG)
@@ -41,7 +41,7 @@ def build_crg_fluxes(
     for file in crg_path.glob(pattern):
         fluxes[f"CRG - {file.name}"] = Flux(
             sources=[CSVSource(filename=file.name, options=csv_options)],
-            transformation=transformation,
+            transformation=Transformation(function=transformation),
             destination=Destination(name=file.name),
         )
     return fluxes