feat: implement a new simulation analyzer component to track and analyze various performance metrics and material flow.

app/src/modules/simulation/analyzer/analyzer.tsx

@@ -245,15 +245,51 @@ function Analyzer() {
         setAnalyzing(false);
     };
 
+    // Simulation Time Tracking
+    const simulationTimeRef = useRef<number>(0);
+    const lastSpeedUpdateRef = useRef<number>(Date.now());
+    const prevSpeedRef = useRef<number>(speed); // Initialize with current speed
+
+    // Reset accumulated time when simulation stops/starts
     useEffect(() => {
         if (!isPlaying) {
             resetAllRefs();
+            simulationTimeRef.current = 0;
+            lastSpeedUpdateRef.current = Date.now();
         } else {
             // Reset start time when simulation starts
             startTimeRef.current = new Date().toISOString();
+            simulationTimeRef.current = 0;
+            lastSpeedUpdateRef.current = Date.now();
         }
     }, [isPlaying]);
 
+    // Track accumulated simulation time on speed change
+    useEffect(() => {
+        if (!isPlaying) {
+            prevSpeedRef.current = speed;
+            return;
+        }
+
+        const now = Date.now();
+        const deltaReal = now - lastSpeedUpdateRef.current;
+
+        // Add time segment using previous speed
+        simulationTimeRef.current += deltaReal * Math.max(1, prevSpeedRef.current);
+
+        lastSpeedUpdateRef.current = now;
+        prevSpeedRef.current = speed; // Update for next segment
+    }, [speed, isPlaying]);
+
+    const getSimulationDuration = () => {
+        if (!isPlaying) return simulationTimeRef.current;
+
+        const now = Date.now();
+        const deltaReal = now - lastSpeedUpdateRef.current;
+        // Current accumulating segment uses current speed
+        return simulationTimeRef.current + deltaReal * Math.max(1, speed);
+    };
+
     // ============================================================================
     // ENHANCED UTILITY FUNCTIONS
     // ============================================================================
@@ -326,12 +362,12 @@ function Analyzer() {
         const wip = materialsOnAsset;
 
         // Calculate throughput (items per second)
-        // Ensure we don't divide by zero
-        const durationMs = Date.now() - new Date(startTimeRef.current).getTime();
+        // Use accumulated simulation duration
+        const durationMs = getSimulationDuration();
 
-        // Normalize by simulation speed to get "simulation time" throughput
-        const currentSpeed = Math.max(1, speed);
-        const throughput = durationMs > 1000 ? ((removals.length / durationMs) * 1000) / currentSpeed : 0;
+        // Throughput = items / simulation seconds
+        // durationMs is already in "simulation milliseconds" (real ms * speed)
+        const throughput = durationMs > 1000 ? (removals.length / durationMs) * 1000 : 0;
 
         // Calculate lead times (processing times on this asset)
         const leadTimes = removals.map((m) => m.processingTime || 0).filter((t) => t > 0);
@@ -1975,7 +2011,6 @@ function Analyzer() {
                 };
             });
 
-            // Material Flow Analysis
             // Material Flow Analysis
             const totalMaterialsInSystem = materials.filter((m) => m.isActive).length;