diff --git a/app/db/migration_readiness.py b/app/db/migration_readiness.py
index d0deff7..4a7e343 100644
--- a/app/db/migration_readiness.py
+++ b/app/db/migration_readiness.py
@@ -89,6 +89,32 @@ def _first_int(data: dict[str, Any], keys: tuple[str, ...]) -> int | None:
     return None
 
 
+def _readiness_from_script_output(result_data: dict[str, Any], combined_text: str) -> bool:
+    ready_value = result_data.get("ready")
+    if isinstance(ready_value, bool):
+        return ready_value
+
+    readiness_value = str(
+        result_data.get("readiness")
+        or result_data.get("migration_readiness")
+        or result_data.get("migrationReadiness")
+        or ""
+    ).strip().upper()
+
+    if readiness_value == "READY":
+        return True
+    if readiness_value == "NOT READY":
+        return False
+
+    upper_text = combined_text.upper()
+    if re.search(r"(?<![A-Z0-9_])NOT\s+READY(?![A-Z0-9_])", upper_text):
+        return False
+    if re.search(r"(?<![A-Z0-9_])READY(?![A-Z0-9_])", upper_text):
+        return True
+
+    return False
+
+
 def summarize_readiness(job: dict[str, Any] | None) -> dict[str, Any]:
     if not job:
         return {
@@ -123,22 +149,8 @@ def summarize_readiness(job: dict[str, Any] | None) -> dict[str, Any]:
     if fail_count is None:
         fail_count = _count_token(combined_text, "FAIL")
 
-    readiness_value = str(
-        result_data.get("readiness")
-        or result_data.get("ready")
-        or result_data.get("status")
-        or ""
-    ).strip().upper()
-
-    if readiness_value in {"READY", "TRUE", "OK", "SUCCESS"}:
-        ready = fail_count == 0 and (job.get("status") or "").lower() == "success"
-    elif readiness_value in {"NOT READY", "FALSE", "FAIL", "FAILED", "ERROR"}:
-        ready = False
-    else:
-        ready = fail_count == 0 and (job.get("status") or "").lower() == "success"
-
     return {
-        "ready": ready,
+        "ready": _readiness_from_script_output(result_data, combined_text),
         "ok_count": ok_count,
         "warn_count": warn_count,
         "fail_count": fail_count,
diff --git a/app/routes/migration_readiness.py b/app/routes/migration_readiness.py
index ee72f81..6aa7969 100644
--- a/app/routes/migration_readiness.py
+++ b/app/routes/migration_readiness.py
@@ -54,7 +54,7 @@ def migration_readiness_page(request: Request, user=Depends(require_user)):
         f"""
         <div class="card">
             <h2>Migration Readiness</h2>
-            <p class="muted">Poslední výsledek maintenance skriptu {html.escape(PREFLIGHT_SCRIPT)} uložený v databázi.</p>
+            <p class="muted">Poslední výsledek maintenance skriptu {html.escape(PREFLIGHT_SCRIPT)} uložený v databázi. Stav vychází pouze z výstupu skriptu.</p>
             <form method="post" action="/portal/migration-readiness/run">
                 <button type="submit">Spustit preflight kontrolu</button>
             </form>