diff --git a/app/[slug]/dashboard/tables/page.tsx b/app/[slug]/dashboard/tables/page.tsx
index 9890735..8fd4a81 100644
--- a/app/[slug]/dashboard/tables/page.tsx
+++ b/app/[slug]/dashboard/tables/page.tsx
@@ -2,15 +2,41 @@
 
 'use client';
 
+import { AbstractApi } from '@/app/api/abstract-api';
+import { TableSimulation, TableSimulationSerializer } from '@/app/lib/tableSimulation';
 import Arrangement from '@/app/ui/arrangements/arrangement';
-import React, { useState } from 'react';
 import ArrangementsTable from '@/app/ui/arrangements/arrangements-table';
+import { classNames } from '@/app/ui/components/button';
+import { Toast } from 'primereact/toast';
+import React, { useRef, useState } from 'react';
 
 export default function Page() {
+  const toast = useRef<Toast>(null);
+
+  const show = () => {
+    toast.current?.show({
+      severity: 'success',
+      summary: 'Simulation created',
+      detail: 'Table distributions will be calculated shortly, please come back in some minutes'
+    });
+  };
+
   const [currentArrangement, setCurrentArrangement] = useState<string | null>(null);
 
+  function createSimulation() {
+    const api = new AbstractApi<TableSimulation>();
+    const serializer = new TableSimulationSerializer();
+    api.create(serializer, new TableSimulation(), show);
+  }
+
   return (
     <>
+
+      <div className="flex flex-col w-full items-center justify-between">
+        <Toast ref={toast} />
+        <button onClick={createSimulation} className={classNames('primary')}>Add new</button>
+      </div>
+
       <ArrangementsTable onArrangementSelected={setCurrentArrangement} />
       {currentArrangement && <Arrangement key={currentArrangement} id={currentArrangement} />}
     </>
diff --git a/app/api/tableSimulations.tsx b/app/api/tableSimulations.tsx
index 6bf36d7..5b0f538 100644
--- a/app/api/tableSimulations.tsx
+++ b/app/api/tableSimulations.tsx
@@ -12,6 +12,7 @@ export function loadTableSimulations(onLoad?: (tableSimulations: TableArrangemen
           id: record.id,
           name: record.name,
           discomfort: record.discomfort,
+          valid: record.valid,
         });
       }));
     }, (error) => {
diff --git a/app/lib/definitions.ts b/app/lib/definitions.ts
index b03ef4b..5e6ffe8 100644
--- a/app/lib/definitions.ts
+++ b/app/lib/definitions.ts
@@ -12,7 +12,8 @@ export type TableArrangement = {
   number: number;
   name: string;
   guests?: Guest[];
-  discomfort?: number
+  discomfort?: number;
+  valid?: boolean;
 }
 
 export type User = {
diff --git a/app/lib/tableSimulation.tsx b/app/lib/tableSimulation.tsx
index 9e276a4..7a01b4d 100644
--- a/app/lib/tableSimulation.tsx
+++ b/app/lib/tableSimulation.tsx
@@ -19,12 +19,12 @@ export type Table = {
 }
 
 export class TableSimulation implements Entity {
-  id: string;
+  id?: string;
   tables: Table[];
 
-  constructor(id: string, tables: Table[]) {
+  constructor(id?: string, tables?: Table[]) {
     this.id = id;
-    this.tables = tables;
+    this.tables = tables || [];
   }
 }
 
diff --git a/app/ui/arrangements/arrangements-table.tsx b/app/ui/arrangements/arrangements-table.tsx
index 9a650e7..07a3eff 100644
--- a/app/ui/arrangements/arrangements-table.tsx
+++ b/app/ui/arrangements/arrangements-table.tsx
@@ -7,42 +7,57 @@ import { TableArrangement } from '@/app/lib/definitions';
 import { classNames } from "../components/button";
 import TableOfContents from "../components/table-of-contents";
 import { loadTableSimulations } from "@/app/api/tableSimulations";
+import { ArchiveBoxXMarkIcon, CheckBadgeIcon } from "@heroicons/react/24/outline";
+import { Tooltip } from "primereact/tooltip";
+import clsx from "clsx";
 
-export default function ArrangementsTable ({onArrangementSelected}: {onArrangementSelected: (arrangementId: string) => void}) {
-    const [arrangements, setArrangements] = useState<Array<TableArrangement>>([]);
-    const [arrangementsLoaded, setArrangementsLoaded] = useState(false);
+export default function ArrangementsTable({ onArrangementSelected }: { onArrangementSelected: (arrangementId: string) => void }) {
+  const [arrangements, setArrangements] = useState<Array<TableArrangement>>([]);
+  const [arrangementsLoaded, setArrangementsLoaded] = useState(false);
 
-    function refreshSimulations() {
-      loadTableSimulations((arrangements) => {
-        setArrangements(arrangements);
-        setArrangementsLoaded(true);
-      });
-    }
+  function refreshSimulations() {
+    loadTableSimulations((arrangements) => {
+      setArrangements(arrangements);
+      setArrangementsLoaded(true);
+    });
+  }
 
-    function arrangementClicked(e: React.MouseEvent<HTMLElement>) {
-        onArrangementSelected(e.currentTarget.getAttribute('data-arrangement-id') || '');
-    }
-  
-    !arrangementsLoaded && refreshSimulations();
+  function arrangementClicked(e: React.MouseEvent<HTMLElement>) {
+    onArrangementSelected(e.currentTarget.getAttribute('data-arrangement-id') || '');
+  }
 
-    return(
-      <TableOfContents
-        headers={['Name', 'Discomfort', 'Actions']}
-        caption='Simulations'
-        elements={arrangements}
-        rowRender={(arrangement) => (
-          <tr key={arrangement.id} className="bg-white border-b odd:bg-white odd:dark:bg-gray-900 even:bg-gray-50 even:dark:bg-gray-800">
-            <th scope="row" className="px-6 py-4 font-medium text-gray-900 whitespace-nowrap dark:text-white">
-              {arrangement.name}
-            </th>
-            <td className="px-6 py-4">
-              {arrangement.discomfort}
-            </td>
-            <td>
-                <button data-arrangement-id={arrangement.id} onClick={arrangementClicked} className={classNames('primary')}>Load</button>
-            </td>
-          </tr>
-        )}
-      />
-    );
+  !arrangementsLoaded && refreshSimulations();
+
+  return (
+    <TableOfContents
+      headers={['Name', 'Discomfort', 'Actions', 'Status']}
+      caption='Simulations'
+      elements={arrangements}
+      rowRender={(arrangement) => (
+        <tr key={arrangement.id} className={clsx("border-b", {
+          "bg-white odd:bg-white even:bg-gray-50": arrangement.valid,
+          "bg-red-50 odd:bg-red-50 even:bg-red-100": !arrangement.valid
+        })}>
+          <th scope="row" className="px-6 py-4 font-medium text-gray-900 whitespace-nowrap">
+            {arrangement.name}
+          </th>
+          <td className="px-6 py-4">
+            {arrangement.discomfort}
+          </td>
+          <td>
+            <button data-arrangement-id={arrangement.id} onClick={arrangementClicked} className={classNames('primary')}>Load</button>
+          </td>
+          <td>
+            <Tooltip target=".tooltip-status" />
+
+            {
+              arrangement.valid ?
+                <CheckBadgeIcon className='size-6 tooltip-status' data-pr-position="right" data-pr-tooltip="Simulation is valid" /> :
+                <ArchiveBoxXMarkIcon className='size-6 tooltip-status' data-pr-position="right" data-pr-tooltip="Simulation is expired due to attendance or affinity changes" />
+            }
+          </td>
+        </tr>
+      )}
+    />
+  );
 }
\ No newline at end of file