diff --git a/src/components/IncrementButton.vue b/src/components/IncrementButton.vue
index 488a66b..e43a04e 100644
--- a/src/components/IncrementButton.vue
+++ b/src/components/IncrementButton.vue
@@ -33,6 +33,8 @@
 </template>
 
 <script>
+import { MAX_FIELDS_VALUE } from '../constants';
+
 export default {
   props: {
     value: {
@@ -44,7 +46,7 @@ export default {
       type: Number,
     },
     max: {
-      default: undefined,
+      default: MAX_FIELDS_VALUE,
       type: Number,
     },
   },
@@ -122,11 +124,11 @@ export default {
 
 <style>
 .increment-button {
-  min-width: 60px;
+  min-width: 70px;
 }
 
 .increment-button input {
-  width: 30px;
+  width: 40px;
   text-align: center;
   border-width: 1px 0;
   border-style: solid;
diff --git a/src/components/Scenario.vue b/src/components/Scenario.vue
index 0147392..a7a916d 100644
--- a/src/components/Scenario.vue
+++ b/src/components/Scenario.vue
@@ -17,7 +17,6 @@
               </span>
               <IncrementButton
                 v-model="scenario.numberOfParticipants"
-                :max="999"
                 :min="1"
                 class="align-right"
               /><br />
@@ -28,7 +27,6 @@
               </span>
               <IncrementButton
                 v-model="scenario.meetingDuration"
-                :max="999"
                 :min="1"
                 class="align-right"
               /><br />
@@ -60,7 +58,6 @@
               </Tooltip>
               <IncrementButton 
                 v-model="scenario.software.numberOfInstances"
-                :max="999"
                 :min="0"
                 class="align-right"
               /><br />
@@ -87,7 +84,6 @@
               </span>
               <IncrementButton
                 v-model="h.qty"
-                :max="99"
                 class="align-right"
               /><br />
             </div>
@@ -106,7 +102,7 @@
               v-for="j in scenario.journey"
               :key="j.length"
             >
-              <IncrementButton v-model="j.distance" :max="9999" />
+              <IncrementButton v-model="j.distance"/>
               <p>km en</p>
               <select v-model="j.mean" class="select-journey">
                 <option disabled value="">...</option>
@@ -170,8 +166,8 @@ const { NB_OF_INSTANCES } = SOFTWARE;
 
 function initialScenario() {
   return {
-    meetingDuration: 1,
-    numberOfParticipants: 1,
+    meetingDuration: 60,
+    numberOfParticipants: 2,
     hardware: [
       {
         name: "LAPTOP",
diff --git a/src/constants.js b/src/constants.js
index 267e63c..5d33b44 100644
--- a/src/constants.js
+++ b/src/constants.js
@@ -4,3 +4,5 @@ export const SOFTWARE = {
     WITH_SOFTWARE: 2,
   },
 };
+
+export const MAX_FIELDS_VALUE = 99999;