diff --git a/artifact_1_band_width_analysis/src/artifact_1_band_width_analysis/cli.py b/artifact_1_band_width_analysis/src/artifact_1_band_width_analysis/cli.py
new file mode 100644
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+++ b/artifact_1_band_width_analysis/src/artifact_1_band_width_analysis/cli.py
@@ -0,0 +1,73 @@
+import argparse
+import json
+from pathlib import Path
+from typing import Any
+
+from artifact_1_band_width_analysis.core import calculate_statistics, compare_runs, RunData
+
+def main() -> None:
+    """Command-line entry point for Band Width Analysis."""
+    parser = argparse.ArgumentParser(
+        description="Analyse von Bandbreiten- und Retry-Kennzahlen für Systemruns."
+    )
+    parser.add_argument(
+        "--input",
+        required=True,
+        help="Pfad zur JSON-Datei mit RunData-Einträgen."
+    )
+    parser.add_argument(
+        "--output",
+        required=True,
+        help="Pfad für die Ausgabe der Analyseergebnisse."
+    )
+    args = parser.parse_args()
+
+    input_path = Path(args.input)
+    output_path = Path(args.output)
+
+    if not input_path.exists():
+        raise FileNotFoundError(f"Eingabedatei nicht gefunden: {input_path}")
+
+    with input_path.open('r', encoding='utf-8') as f:
+        try:
+            raw_data = json.load(f)
+        except json.JSONDecodeError as e:
+            raise ValueError(f"Ungültiges JSON-Format: {e}")
+
+    if not isinstance(raw_data, list):
+        raise ValueError("Erwartet wird eine Liste von RunData-Objekten im JSON.")
+
+    runs = []
+    for idx, entry in enumerate(raw_data):
+        if not all(k in entry for k in ("band_width", "aux", "near_expiry", "retry_tail_p99")):
+            raise ValueError(f"Eintrag {idx} ist unvollständig: {entry}")
+        try:
+            run = RunData(
+                band_width=float(entry["band_width"]),
+                aux=int(entry["aux"]),
+                near_expiry=float(entry["near_expiry"]),
+                retry_tail_p99=float(entry["retry_tail_p99"])
+            )
+        except (TypeError, ValueError) as e:
+            raise ValueError(f"Ungültige Datentypen in RunData {idx}: {e}")
+        runs.append(run)
+
+    stats = calculate_statistics(runs)
+    comparisons: list[dict[str, Any]] = []
+    for i in range(len(runs) - 1):
+        comp = compare_runs(runs[i], runs[i + 1])
+        comparisons.append(comp)
+
+    result = {
+        "statistics": stats,
+        "comparisons": comparisons
+    }
+
+    output_path.parent.mkdir(parents=True, exist_ok=True)
+    with output_path.open('w', encoding='utf-8') as f:
+        json.dump(result, f, indent=2, ensure_ascii=False)
+
+    print(f"Analyse abgeschlossen. Ergebnisse gespeichert unter: {output_path}")
+
+if __name__ == "__main__":
+    main()
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