set trigger every 15'

Jenkinsfile

@@ -16,8 +16,10 @@ pipeline {
         label 'CD'
     }
     triggers {
+//     every fifteen minutes (perhaps at :07, :22, :37, :52)
+       cron('H/15 * * * *')
 //     once a day on the 1st and 15th of every month
-        cron 'H H 1,15 * *'
+//         cron ('H H 1,15 * *')
     }
          //once in every two hours slot between 9 AM and 5 PM every weekday (perhaps at 10:38 AM, 12:38 PM, 2:38 PM, 4:38 PM)
 //             cron('H H(9-16)/2 * * 1-5')
@@ -41,6 +43,7 @@ pipeline {
             when{
                 allOf{
                     triggeredBy 'TimerTrigger'
+          // maybe we can add a new condition in order to consider the manual execution of this pipeline
                     environment name: 'IS_CRON', value: 'True'
                 }
             }
@@ -67,18 +70,6 @@ pipeline {
                  echo 'Do Nothing: cron build disabled'
             }
         }
-        stage('Nothing to do by Job ') {
-            when{
-                environment name: 'IS_CRON', value: 'True'
-                anyOf{
-                    triggeredBy 'BuildUpstreamCause'
-                    triggeredBy 'UpstreamCause'
-                }
-            }
-            steps {
-                 echo 'Do Nothing: cron build disabled'
-            }
-        }
         stage('Add new pending deploy ') {
             when{
                 environment name: 'IS_CRON', value: 'True'