diff --git a/src/specificClass.js b/src/specificClass.js
index d4dbdfe..d2a79bb 100644
--- a/src/specificClass.js
+++ b/src/specificClass.js
@@ -23,7 +23,9 @@ class PumpingStation {
     //variants in determining what gets priority
     this.flowVariants = ['measured', 'predicted'];
     this.levelVariants = ['measured', 'predicted'];
+    this.volVariants = ['measured', 'predicted'];
     this.flowPositions = { inflow: ['in', 'upstream'], outflow: ['out', 'downstream'] };
+    this.predictedFlowChildren = new Map(); // childId -> { in: 0, out: 0 }
 
     this.basin = {};
     this.state = {
@@ -49,7 +51,7 @@ class PumpingStation {
       return;
     }
 
-    if (softwareType === 'machine' || softwareType === 'pumpingStation') {
+    if (softwareType === 'machine' || softwareType === 'pumpingStation' || softwareType === 'machineGroupController') {
       this._registerPredictedFlowChild(child);
       return;
     }
@@ -57,16 +59,38 @@ class PumpingStation {
     this.logger.warn(`Unsupported child software type: ${softwareType}`);
   }
 
+  _safeGuardSystem(snapshot,remainingTime){
+    let vol = null;
+
+    for (const variant of this.volVariants){
+      const volsnap = snapshot.vols[variant];
+      //go through with variants until we find one that exists
+      if (!volsnap.samples.exists){ continue};
+
+      const vol = volsnap.samples.current?.value ?? null;
+    } 
+
+    if(vol == null){
+      //if we cant get a volume, we must force whole system off.
+      
+    };
+/*
+    if(remainingTime < timeThreshhold || vol > maxVolume || vol < minVolume){}
+    */
+
+  }
+
   tick() {
     const snapshot = this._takeMeasurementSnapshot();
 
     this._updatePredictedVolume(snapshot);
+    
 
     const netFlow = this._selectBestNetFlow(snapshot);
-    //write netflow in measurment container
-    
     const remaining = this._computeRemainingTime(snapshot, netFlow);
 
+    this._safeGuardSystem(snapshot,remaining.seconds);
+
     this.state = {
       direction: netFlow.direction,
       netFlow: netFlow.value,
@@ -100,32 +124,63 @@ class PumpingStation {
     });
   }
 
+  //register machines or pumping stations that can provide predicted flow data
   _registerPredictedFlowChild(child) {
     const position = child.config.functionality.positionVsParent;
     const childName = child.config.general.name;
+    const childId = child.config.general.id ?? childName;
 
-    const listener = (eventName, posKey) => {
-      child.measurements.emitter.on(eventName, (eventData) => {
-        this.logger.debug(
-          `Predicted flow update from ${childName} (${position}) -> ${eventData.value} ${eventData.unit}`
-        );
-        this.measurements
-          .type('flow')
-          .variant('predicted')
-          .position(posKey)
-          .value(eventData.value, eventData.timestamp, eventData.unit);
-      });
+    const posKey =
+      position === 'downstream' || position === 'out' || position === 'atequipment'
+        ? 'out'
+        : position === 'upstream' || position === 'in'
+          ? 'in'
+          : null;
+
+    if (!posKey) {
+      this.logger.warn(`Unsupported predicted flow position "${position}" from ${childName}`);
+      return;
+    }
+
+    if (!this.predictedFlowChildren.has(childId)) {
+      this.predictedFlowChildren.set(childId, { in: 0, out: 0 });
+    }
+
+    const handler = (eventData = {}) => {
+      const value = Number.isFinite(eventData.value) ? eventData.value : 0;
+      const timestamp = eventData.timestamp ?? Date.now();
+      const unit = eventData.unit ?? 'm3/s';
+
+      this.logger.debug(
+        `Predicted flow update from ${childName} (${childId}, ${posKey}) -> ${value} ${unit}`
+      );
+
+      this.predictedFlowChildren.get(childId)[posKey] = value;
+      this._refreshAggregatedPredictedFlow(posKey, timestamp, unit);
     };
 
-    if (position === 'downstream' || position === 'atequipment' || position === 'out') {
-      listener('flow.predicted.downstream', 'out');
-    } else if (position === 'upstream' || position === 'in') {
-      listener('flow.predicted.downstream', 'in');
-    } else {
-      this.logger.warn(`Unsupported predicted flow position "${position}" from ${childName}`);
+    const eventNames =
+      posKey === 'in'
+        ? ['flow.predicted.downstream', 'flow.predicted.upstream']
+        : ['flow.predicted.downstream'];
+
+    for (const eventName of eventNames) {
+      child.measurements.emitter.on(eventName, handler);
     }
   }
 
+  _refreshAggregatedPredictedFlow(direction, timestamp = Date.now(), unit = 'm3/s') {
+    const sum = Array.from(this.predictedFlowChildren.values())
+      .map((entry) => (Number.isFinite(entry[direction]) ? entry[direction] : 0))
+      .reduce((acc, val) => acc + val, 0);
+
+    this.measurements
+      .type('flow')
+      .variant('predicted')
+      .position(direction)
+      .value(sum, timestamp, unit);
+  }
+
   _handleMeasurement(measurementType, value, position, context) {
     switch (measurementType) {
       case 'level':
@@ -213,13 +268,18 @@ class PumpingStation {
     const snapshot = {
       flows: {},
       levels: {},
-      levelRates: {}
+      levelRates: {},
+      vols:{},
     };
 
     for (const variant of this.flowVariants) {
       snapshot.flows[variant] = this._snapshotFlowsForVariant(variant);
     }
 
+    for (const variant of this.volVariants){
+      snapshot.vols[variant] = this._snapshotVolsForVariant(variant);
+    }
+
     for (const variant of this.levelVariants) {
       snapshot.levels[variant] = this._snapshotLevelForVariant(variant);
       snapshot.levelRates[variant] = this._estimateLevelRate(snapshot.levels[variant]);
@@ -228,15 +288,17 @@ class PumpingStation {
     return snapshot;
   }
 
+  _snapshotVolsForVariant(variant) {
+    const volumeSeries = this._locateSeries('volume', variant, ['atequipment']);
+
+    return {variant,samples: this._seriesSamples(volumeSeries)};
+  }
+
   _snapshotFlowsForVariant(variant) {
     const inflowSeries = this._locateSeries('flow', variant, this.flowPositions.inflow);
     const outflowSeries = this._locateSeries('flow', variant, this.flowPositions.outflow);
 
-    return {
-      variant,
-      inflow: this._seriesSamples(inflowSeries),
-      outflow: this._seriesSamples(outflowSeries)
-    };
+    return {variant, inflow: this._seriesSamples(inflowSeries), outflow: this._seriesSamples(outflowSeries) };
   }
 
   _snapshotLevelForVariant(variant) {
@@ -342,6 +404,7 @@ class PumpingStation {
       return { seconds: null, source: null };
     }
 
+    
     for (const variant of this.levelVariants) {
       const levelSnap = snapshot.levels[variant];
       const current = levelSnap.samples.current?.value ?? null;
@@ -405,10 +468,7 @@ class PumpingStation {
 
     const writeTimestamp = timestampPrev + Math.max(deltaSeconds, 0) * 1000;
 
-    const volumeSeries = this.measurements
-      .type('volume')
-      .variant('predicted')
-      .position('atEquipment');
+    const volumeSeries = this.measurements.type('volume').variant('predicted').position('atEquipment');
 
     const currentVolume = volumeSeries.getCurrentValue('m3') ?? this.basin.minVol;