diff --git a/results_visualization/js/dataProcessor.js b/results_visualization/js/dataProcessor.js
new file mode 100644
index 0000000..b1fc096
--- /dev/null
+++ b/results_visualization/js/dataProcessor.js
@@ -0,0 +1,71 @@
+/* js/dataProcessor.js
+ * Verantwortlich für Transformierung der eBPF Analyse-Rohdaten
+ * in darstellungsfähige Strukturen (Diagramme & Tabellen)
+ */
+
+/**
+ * Verknüpft write_pre und write_post Events anhand derselben corr_id.
+ * @param {Array<{corr_id: string, type: string, timestamp: number, details: object}>} rawData
+ * @returns {Array<{corr_id: string, pre: object|null, post: object|null, duration: number|null}>}
+ */
+export function aggregatePrePostPairs(rawData) {
+  if (!Array.isArray(rawData)) return [];
+
+  const grouped = new Map();
+  for (const event of rawData) {
+    if (!event?.corr_id || !event?.type) continue;
+
+    const group = grouped.get(event.corr_id) ?? { corr_id: event.corr_id, pre: null, post: null, duration: null };
+
+    if (event.type === 'write_pre') {
+      group.pre = event;
+    } else if (event.type === 'write_post') {
+      group.post = event;
+    }
+
+    grouped.set(event.corr_id, group);
+  }
+
+  const pairs = [];
+  for (const [, pair] of grouped) {
+    if (pair.pre && pair.post) {
+      pair.duration = pair.post.timestamp - pair.pre.timestamp;
+    }
+    pairs.push(pair);
+  }
+
+  return pairs;
+}
+
+/**
+ * Berechnet Kennzahlen wie mittlere Dauer, Eventanzahl pro Typ.
+ * @param {Array<{corr_id: string, pre: object|null, post: object|null, duration: number|null}>} aggregatedEvents
+ * @returns {{totalEvents: number, counts: Record<string, number>, meanDuration: number|null}}
+ */
+export function computeStats(aggregatedEvents) {
+  if (!Array.isArray(aggregatedEvents)) return { totalEvents: 0, counts: {}, meanDuration: null };
+
+  const counts = { write_pre: 0, write_post: 0, read: 0 };
+  let totalDuration = 0;
+  let validDurations = 0;
+  let totalEvents = 0;
+
+  aggregatedEvents.forEach(entry => {
+    if (entry.pre) counts.write_pre++;
+    if (entry.post) counts.write_post++;
+    totalEvents++;
+
+    if (typeof entry.duration === 'number' && !isNaN(entry.duration)) {
+      totalDuration += entry.duration;
+      validDurations++;
+    }
+  });
+
+  const meanDuration = validDurations > 0 ? totalDuration / validDurations : null;
+
+  return {
+    totalEvents,
+    counts,
+    meanDuration
+  };
+}