diff --git a/config.json b/config.json
index 368a471..a1a975b 100644
--- a/config.json
+++ b/config.json
@@ -41,9 +41,10 @@
       "antragsnummer": "B",
       "name": "C",
       "qualifikation": "D",
-      "stellenanteil": "E",
-      "funktion": "F",
-      "taetigkeit": "G"
+      "project_scope": "E",
+      "stellenanteil": "F",
+      "funktion": "G",
+      "taetigkeit": "H"
     },
     "decimal": {
       "decimal_separator": ",",
diff --git a/src/taetigkeitsnachweis/matcher.py b/src/taetigkeitsnachweis/matcher.py
index a73b77c..9748b92 100644
--- a/src/taetigkeitsnachweis/matcher.py
+++ b/src/taetigkeitsnachweis/matcher.py
@@ -46,12 +46,23 @@ def _name_keys(name: str) -> set[str]:
 
 
 def _disambiguate_by_project_key(
-    candidates: list,
+    candidates: list[MasterDataRecord],
     project_key: str,
-) -> object:
-    """Return the single candidate whose Funktion contains the project key, or None."""
-    key = project_key.strip().casefold()
-    matched = [c for c in candidates if key in c.funktion.casefold()]
+) -> MasterDataRecord | None:
+    """Return the single candidate matching allocation project key via masterdata project_scope."""
+    parts = [
+        token.strip().casefold()
+        for token in re.split(r"[/,;|]", project_key)
+        if token.strip()
+    ]
+    project_tokens = set(parts or [project_key.strip().casefold()])
+
+    matched = []
+    for candidate in candidates:
+        candidate_scope = (candidate.project_scope or "PS").strip().casefold()
+        if candidate_scope in project_tokens:
+            matched.append(candidate)
+
     return matched[0] if len(matched) == 1 else None
 
 
@@ -105,7 +116,7 @@ def match_assignments(
         if len(candidates) == 1:
             selected = candidates[0]
         else:
-            # Multiple candidates: disambiguate by project key in Funktion
+            # Multiple candidates: disambiguate by explicit project scope column.
             selected = _disambiguate_by_project_key(candidates, allocation.project_key)
             if selected is None:
                 issues.append(
@@ -114,8 +125,8 @@ def match_assignments(
                         message=(
                             f"Ambiguous master-data for '{allocation.employee_name}' / "
                             f"'{allocation.project_key}': {len(candidates)} rows, "
-                            f"none or multiple match Funktion. "
-                            f"Funktionen: {[c.funktion for c in candidates]}"
+                            f"none or multiple match project_scope. "
+                            f"project_scope values: {[c.project_scope for c in candidates]}"
                         ),
                         severity="error",
                         context=allocation.employee_name,
diff --git a/src/taetigkeitsnachweis/models.py b/src/taetigkeitsnachweis/models.py
index 38ee4cb..e0134b8 100644
--- a/src/taetigkeitsnachweis/models.py
+++ b/src/taetigkeitsnachweis/models.py
@@ -19,6 +19,7 @@ class MasterDataRecord:
     antragsnummer: str
     name: str
     qualifikation: str
+    project_scope: str
     stellenanteil_percent: float
     funktion: str
     taetigkeit: str
diff --git a/src/taetigkeitsnachweis/parser.py b/src/taetigkeitsnachweis/parser.py
index 5d81a5f..c59fb5d 100644
--- a/src/taetigkeitsnachweis/parser.py
+++ b/src/taetigkeitsnachweis/parser.py
@@ -243,6 +243,7 @@ def parse_masterdata_records(
     antragsnummer_col = column_index_from_string(columns_cfg["antragsnummer"])
     name_col = column_index_from_string(columns_cfg["name"])
     qualifikation_col = column_index_from_string(columns_cfg["qualifikation"])
+    project_scope_col = column_index_from_string(columns_cfg["project_scope"])
     stellenanteil_col = column_index_from_string(columns_cfg["stellenanteil"])
     funktion_col = column_index_from_string(columns_cfg["funktion"])
     taetigkeit_col = column_index_from_string(columns_cfg["taetigkeit"])
@@ -254,12 +255,16 @@ def parse_masterdata_records(
         if not name:
             continue
 
-        stellenanteil = _parse_german_decimal(
-            worksheet.cell(row=row_index, column=stellenanteil_col).value,
-            field_name=f"stellenanteil row {row_index}",
-            decimal_separator=decimal_cfg.get("decimal_separator", ","),
-            thousands_separator=decimal_cfg.get("thousands_separator", "."),
+        stellenanteil_raw = worksheet.cell(row=row_index, column=stellenanteil_col).value
+        stellenanteil = _to_float_or_none(stellenanteil_raw)
+        if stellenanteil is None:
+            stellenanteil = 0.0
+
+        project_scope = _to_text(
+            worksheet.cell(row=row_index, column=project_scope_col).value
         )
+        if not project_scope:
+            project_scope = "PS"
 
         records.append(
             MasterDataRecord(
@@ -271,6 +276,7 @@ def parse_masterdata_records(
                 qualifikation=_to_text(
                     worksheet.cell(row=row_index, column=qualifikation_col).value
                 ),
+                project_scope=project_scope,
                 stellenanteil_percent=stellenanteil,
                 funktion=_to_text(worksheet.cell(row=row_index, column=funktion_col).value),
                 taetigkeit=_to_text(
diff --git a/src/taetigkeitsnachweis/validator.py b/src/taetigkeitsnachweis/validator.py
index a06be1b..f02a1a0 100644
--- a/src/taetigkeitsnachweis/validator.py
+++ b/src/taetigkeitsnachweis/validator.py
@@ -132,6 +132,7 @@ def validate_sources(
         master_cols["antragsnummer"],
         master_cols["name"],
         master_cols["qualifikation"],
+        master_cols["project_scope"],
         master_cols["stellenanteil"],
         master_cols["funktion"],
         master_cols["taetigkeit"],