diff --git a/src/proc/engine/dispatcher.hpp b/src/proc/engine/dispatcher.hpp
index db358991e..d24df3a12 100644
--- a/src/proc/engine/dispatcher.hpp
+++ b/src/proc/engine/dispatcher.hpp
@@ -88,10 +88,14 @@ namespace engine {
           
           operator JobPlanningSequence()
             {
+              TimeAnchor nextPlanningAnchor = refPoint_.buildNextAnchor();
+              
               TODO ("build the continuation job if necessary, wrap the sequence");
               
               return JobPlanningSequence(
-                  relativeFrameLocation(refPoint_), dispatcher_); 
+                  relativeFrameLocation(refPoint_),
+                  nextPlanningAnchor.getStartFrame(),
+                  dispatcher_); 
             }
 
         };
diff --git a/src/proc/engine/job-planning.hpp b/src/proc/engine/job-planning.hpp
index b4a48b39e..4dcfb61e2 100644
--- a/src/proc/engine/job-planning.hpp
+++ b/src/proc/engine/job-planning.hpp
@@ -286,6 +286,7 @@ namespace engine {
     {
       FrameLocator* locationGenerator_;
       FrameCoord    currentLocation_;
+      int64_t       stopFrame_;
       
       //////////////////////////////////////////TODO duplicated storage of a FrameCoord record
       //////////////////////////////////////////TODO nextEvaluation_ is only needed to initialise the "current" sequence 
@@ -310,9 +311,10 @@ namespace engine {
       typedef JobPlanning *  pointer;
       
       
-      PlanningStepGenerator(FrameCoord startPoint, FrameLocator& locator)
+      PlanningStepGenerator(FrameCoord startPoint, int64_t stopPoint, FrameLocator& locator)
         : locationGenerator_(&locator)
         , currentLocation_(startPoint)
+        , stopFrame_(stopPoint)
         { }
       
       // default copyable
@@ -323,7 +325,7 @@ namespace engine {
       friend bool
       checkPoint (PlanningStepGenerator const& gen)
       {
-        UNIMPLEMENTED ("determine planing chunk size"); /// return bool(seq.feed());
+        return gen.currentLocation_.absoluteFrameNumber < gen.stopFrame_;
       }
       
       friend JobPlanning&
@@ -381,10 +383,10 @@ namespace engine {
     {
       
     public:
-      JobPlanningSequence(engine::FrameCoord startPoint, FrameLocator& locator)
+      JobPlanningSequence(engine::FrameCoord startPoint, int64_t stopPoint, FrameLocator& locator)
         : ExpandedPlanningSequence(
             JobPlanningChunkStartPoint(
-                PlanningStepGenerator(startPoint,locator))
+                PlanningStepGenerator(startPoint,stopPoint,locator))
             >>= expandPrerequisites)                    // "flat map" (monad operation)
         { }
       
diff --git a/src/proc/engine/time-anchor.hpp b/src/proc/engine/time-anchor.hpp
index 4033e8941..75b0aae1b 100644
--- a/src/proc/engine/time-anchor.hpp
+++ b/src/proc/engine/time-anchor.hpp
@@ -159,6 +159,13 @@ namespace engine {
         }
       
       
+      /** @return the frame at which any job planning
+       *          for this planning chunk will start */
+      int64_t getStartFrame()  const
+        {
+          return anchorPoint_;
+        }
+      
       
       Offset
       remainingRealTimeFor (FrameCoord plannedFrame)