diff --git a/jjb/pipeline/voltha/voltha-2.12/bbsim-tests.groovy b/jjb/pipeline/voltha/voltha-2.12/bbsim-tests.groovy
index 5d97b82..b411109 100644
--- a/jjb/pipeline/voltha/voltha-2.12/bbsim-tests.groovy
+++ b/jjb/pipeline/voltha/voltha-2.12/bbsim-tests.groovy
@@ -40,10 +40,13 @@
 
 // -----------------------------------------------------------------------
 // Intent: Due to lack of a reliable stack trace, construct a literal.
-//         Jenkins will re-write the call stack for serialization.
+//         Jenkins will re-write the call stack for serialization.S
 // -----------------------------------------------------------------------
-String getIam(String func) {
+// Note: Hardcoded version string used to visualize changes in jenkins UI
+// -----------------------------------------------------------------------
+tring getIam(String func, Boolean verbose=True) {
     String branchName = branchName()
+    String version = '4f87de8f31d588d8277dc5ea6fbb69e714c66079'
     String src = [
         'ci-management',
         'jjb',
@@ -53,7 +56,7 @@
         'bbsim-tests.groovy'
     ].join('/')
 
-    String name = [src, func].join('::')
+    String name = [src, version, func].join('::')
     return(name)
 }
 
diff --git a/jjb/voltha-e2e/voltha-2.12.yaml b/jjb/voltha-e2e/voltha-2.12.yaml
index 2a5878b..58ade1e 100644
--- a/jjb/voltha-e2e/voltha-2.12.yaml
+++ b/jjb/voltha-e2e/voltha-2.12.yaml
@@ -137,12 +137,21 @@
       # -----------------------------------------------------------------------
       # md5sum(master): eff05a324e94fdef076b2d5f7cb4f80f
       # -----------------------------------------------------------------------
+      # https://www.lenar.io/jenkins-schedule-build-periodically/
+      # -----------------------------------------------------------------------
       - 'voltha-periodic-test':
           name: 'periodic-voltha-dt-test-bbsim-2.12'
           build-node: 'ubuntu18.04-basebuild-4c-8g'
           pipeline-script: 'voltha/voltha-2.12/bbsim-tests.groovy'
           code-branch: 'voltha-2.12'
-          time-trigger: "@daily"
+          time-trigger : "* 7-18/4 * * *"       # build every 4 hrs between 7am-6pm
+          # -----------------------------------------------------------------------
+          # time-trigger : "H/20 * * * *"   # every 20 min
+          #          time-trigger: "@hourly"
+          #          time-trigger: "@daily"
+          #          time-trigger: "@weekly"
+          #          time-trigger: "monthly"
+          # -----------------------------------------------------------------------
           extraHelmFlags: '--set global.image_tag=master --set onos-classic.image.tag=master '
           testTargets: |
             - target: functional-single-kind-dt