diff --git a/run_eval.bat b/run_eval.bat
new file mode 100644
index 0000000..a86b97a
--- /dev/null
+++ b/run_eval.bat
@@ -0,0 +1,107 @@
+@echo off
+setlocal enabledelayedexpansion
+
+:: ============================================================
+::  run_eval.bat  -  Run a RAGAS evaluation scenario with logs
+::
+::  Usage:
+::    run_eval.bat                          (uses default online scenario)
+::    run_eval.bat offline                  (runs offline smoke scenario)
+::    run_eval.bat path\to\scenario.yaml    (any custom scenario)
+::    run_eval.bat offline DEBUG            (second arg = log level)
+:: ============================================================
+
+cd /d "%~dp0"
+
+echo.
+echo ============================================================
+echo   Siemens RAGAS  -  Evaluation Runner
+echo ============================================================
+echo.
+
+:: ----------------------------------------------------------------
+:: 1. Resolve scenario path  (arg1)
+:: ----------------------------------------------------------------
+set "SCENARIO=%~1"
+if "%SCENARIO%"=="" set "SCENARIO=online"
+
+if /i "%SCENARIO%"=="online" (
+    set "SCENARIO=scenarios\online\siemens-pdf-question-bank-online.yaml"
+)
+if /i "%SCENARIO%"=="offline" (
+    set "SCENARIO=scenarios\offline\siemens-pdf-offline-smoke.yaml"
+)
+
+if not exist "%SCENARIO%" (
+    echo [ERROR] Scenario file not found: %SCENARIO%
+    echo.
+    echo Usage examples:
+    echo   run_eval.bat                    - online eval (default)
+    echo   run_eval.bat offline            - offline smoke
+    echo   run_eval.bat path\to\file.yaml  - custom scenario
+    goto :error
+)
+echo [OK] Scenario : %SCENARIO%
+
+:: ----------------------------------------------------------------
+:: 2. Resolve log level  (arg2, default INFO)
+:: ----------------------------------------------------------------
+set "LOG_LEVEL=%~2"
+if "%LOG_LEVEL%"=="" set "LOG_LEVEL=INFO"
+echo [OK] Log level: %LOG_LEVEL%
+
+:: ----------------------------------------------------------------
+:: 3. Create logs dir and build timestamped log filename
+:: ----------------------------------------------------------------
+if not exist "logs" mkdir logs
+for /f "tokens=1-3 delims=/-" %%a in ("%DATE%") do (
+    set "YMD=%%c-%%a-%%b"
+)
+for /f "tokens=1-3 delims=:." %%a in ("%TIME: =0%") do (
+    set "HMS=%%a%%b%%c"
+)
+set "LOG_FILE=logs\eval_%YMD%_%HMS%.log"
+echo [OK] Log file : %LOG_FILE%
+
+echo.
+echo ============================================================
+echo   Starting evaluation...
+echo   (Logs also written to %LOG_FILE%)
+echo   Press Ctrl+C to abort
+echo ============================================================
+echo.
+
+:: ----------------------------------------------------------------
+:: 4. Run evaluation with UTF-8 and logging
+:: ----------------------------------------------------------------
+set PYTHONIOENCODING=utf-8
+set PYTHONPATH=.
+
+python main.py ^
+    --scenario "%SCENARIO%" ^
+    --log-file "%LOG_FILE%" ^
+    --log-level %LOG_LEVEL%
+
+if errorlevel 1 (
+    echo.
+    echo [ERROR] Evaluation failed. Check log: %LOG_FILE%
+    goto :error
+)
+
+echo.
+echo ============================================================
+echo   Evaluation complete!
+echo   Log saved to: %LOG_FILE%
+echo   Open the web console to view results: start.bat
+echo ============================================================
+echo.
+pause
+exit /b 0
+
+:error
+echo.
+echo ============================================================
+echo   Evaluation failed. See error above or check log file.
+echo ============================================================
+pause
+exit /b 1
diff --git a/run_eval.ps1 b/run_eval.ps1
new file mode 100644
index 0000000..4b9d17e
--- /dev/null
+++ b/run_eval.ps1
@@ -0,0 +1,96 @@
+# run_eval.ps1 - Siemens RAGAS Evaluation Runner
+# Usage:
+#   .\run_eval.ps1                         # online eval (default)
+#   .\run_eval.ps1 offline                 # offline smoke
+#   .\run_eval.ps1 path\to\scenario.yaml   # custom scenario
+#   .\run_eval.ps1 online DEBUG            # second arg = log level (DEBUG/INFO/WARNING)
+# Or: powershell -ExecutionPolicy Bypass -File run_eval.ps1 [scenario] [log-level]
+
+param(
+    [string]$Scenario = "online",
+    [string]$LogLevel = "INFO"
+)
+
+$ErrorActionPreference = "Stop"
+Set-Location $PSScriptRoot
+
+Write-Host ""
+Write-Host "============================================================" -ForegroundColor Cyan
+Write-Host "  Siemens RAGAS  -  Evaluation Runner" -ForegroundColor Cyan
+Write-Host "============================================================" -ForegroundColor Cyan
+Write-Host ""
+
+# ----------------------------------------------------------------
+# 1. Resolve scenario path
+# ----------------------------------------------------------------
+$scenarioMap = @{
+    "online"  = "scenarios\online\siemens-pdf-question-bank-online.yaml"
+    "offline" = "scenarios\offline\siemens-pdf-offline-smoke.yaml"
+}
+if ($scenarioMap.ContainsKey($Scenario.ToLower())) {
+    $Scenario = $scenarioMap[$Scenario.ToLower()]
+}
+if (-not (Test-Path $Scenario)) {
+    Write-Host "[ERROR] Scenario file not found: $Scenario" -ForegroundColor Red
+    Write-Host ""
+    Write-Host "Usage examples:"
+    Write-Host "  .\run_eval.ps1                    - online eval (default)"
+    Write-Host "  .\run_eval.ps1 offline            - offline smoke"
+    Write-Host "  .\run_eval.ps1 path\to\file.yaml  - custom scenario"
+    Read-Host "Press Enter to exit"
+    exit 1
+}
+Write-Host "[OK] Scenario : $Scenario" -ForegroundColor Green
+
+# ----------------------------------------------------------------
+# 2. Validate log level
+# ----------------------------------------------------------------
+$validLevels = @("DEBUG", "INFO", "WARNING", "ERROR")
+if ($validLevels -notcontains $LogLevel.ToUpper()) {
+    Write-Host "[WARN] Unknown log level '$LogLevel', defaulting to INFO" -ForegroundColor Yellow
+    $LogLevel = "INFO"
+}
+Write-Host "[OK] Log level: $LogLevel" -ForegroundColor Green
+
+# ----------------------------------------------------------------
+# 3. Create logs dir with timestamped filename
+# ----------------------------------------------------------------
+if (-not (Test-Path "logs")) { New-Item -ItemType Directory "logs" | Out-Null }
+$timestamp = Get-Date -Format "yyyy-MM-dd_HHmmss"
+$logFile = "logs\eval_$timestamp.log"
+Write-Host "[OK] Log file : $logFile" -ForegroundColor Green
+
+Write-Host ""
+Write-Host "============================================================" -ForegroundColor Cyan
+Write-Host "  Starting evaluation..." -ForegroundColor Cyan
+Write-Host "  Logs also written to: $logFile" -ForegroundColor Cyan
+Write-Host "  Press Ctrl+C to abort" -ForegroundColor Yellow
+Write-Host "============================================================" -ForegroundColor Cyan
+Write-Host ""
+
+# ----------------------------------------------------------------
+# 4. Run evaluation
+# ----------------------------------------------------------------
+$env:PYTHONIOENCODING = "utf-8"
+$env:PYTHONPATH = "."
+
+& python main.py `
+    --scenario $Scenario `
+    --log-file $logFile `
+    --log-level $LogLevel.ToUpper()
+
+if ($LASTEXITCODE -ne 0) {
+    Write-Host ""
+    Write-Host "[ERROR] Evaluation failed. Check log: $logFile" -ForegroundColor Red
+    Read-Host "Press Enter to exit"
+    exit 1
+}
+
+Write-Host ""
+Write-Host "============================================================" -ForegroundColor Green
+Write-Host "  Evaluation complete!" -ForegroundColor Green
+Write-Host "  Log saved to: $logFile" -ForegroundColor Green
+Write-Host "  Open the web console to view results: start.bat" -ForegroundColor Cyan
+Write-Host "============================================================" -ForegroundColor Green
+Write-Host ""
+Read-Host "Press Enter to exit"