diff --git a/src/vault/gear/load-controller.hpp b/src/vault/gear/load-controller.hpp
index 0aceb9a6f..709823dfe 100644
--- a/src/vault/gear/load-controller.hpp
+++ b/src/vault/gear/load-controller.hpp
@@ -205,7 +205,8 @@ namespace gear {
           auto horizon = classifyTimeHorizon (Offset{head - now});
           return horizon > SPINTIME
              and not tendedNext(head)? TENDNEXT
-                                     : horizon;
+                                     : horizon==IDLEWAIT ? WORKTIME
+                                                         : horizon;
         }
       
       /** decide how this thread's capacity shall be used
diff --git a/src/vault/gear/scheduler.hpp b/src/vault/gear/scheduler.hpp
index dc0fb0aa5..10acbf42e 100644
--- a/src/vault/gear/scheduler.hpp
+++ b/src/vault/gear/scheduler.hpp
@@ -50,6 +50,7 @@
 #include "vault/gear/scheduler-invocation.hpp"
 #include "vault/gear/load-controller.hpp"
 #include "vault/gear/engine-observer.hpp"
+#include "vault/real-clock.hpp"
 //#include "lib/symbol.hpp"
 #include  "lib/nocopy.hpp"
 //#include "lib/util.hpp"
@@ -69,6 +70,10 @@ namespace gear {
   using lib::time::Offset;
   using lib::time::Duration;
   
+  namespace test {  // declared friend for test access
+    class SchedulerService_test;
+  }
+  
   namespace { // Scheduler default config
     
     const auto   IDLE_WAIT = 20ms;           ///< sleep-recheck cycle for workers deemed _idle_
@@ -226,6 +231,10 @@ namespace gear {
       
       /** @internal expose a binding for Activity execution */
       class ExecutionCtx;
+      
+      
+      /** open private backdoor for tests */
+      friend class test::SchedulerService_test;
     };
   
   
@@ -284,10 +293,11 @@ namespace gear {
           return POLL_WAIT_DELAY;
         }
       
+      /** access high-resolution-clock, rounded to µ-Ticks */
       Time
       getSchedTime()
         {
-          UNIMPLEMENTED ("access scheduler Time");
+          return RealClock::now();
         }
     };
   
diff --git a/tests/vault/gear/scheduler-load-control-test.cpp b/tests/vault/gear/scheduler-load-control-test.cpp
index cb1e8ac59..4b9c7e47e 100644
--- a/tests/vault/gear/scheduler-load-control-test.cpp
+++ b/tests/vault/gear/scheduler-load-control-test.cpp
@@ -191,9 +191,9 @@ namespace test {
           
           // but after marking `next` as tended, capacity can be directed elsewhere
           lctrl.tendNext (next);
-          CHECK (Capacity::IDLEWAIT == lctrl.markOutgoingCapacity (next, ut ));
+          CHECK (Capacity::WORKTIME == lctrl.markOutgoingCapacity (next, ut ));
           
-          CHECK (Capacity::IDLEWAIT == lctrl.markOutgoingCapacity (next, t1 ));
+          CHECK (Capacity::WORKTIME == lctrl.markOutgoingCapacity (next, t1 ));
           CHECK (Capacity::WORKTIME == lctrl.markOutgoingCapacity (next, t2 ));
           CHECK (Capacity::NEARTIME == lctrl.markOutgoingCapacity (next, t3 ));
           CHECK (Capacity::SPINTIME == lctrl.markOutgoingCapacity (next, t4 ));
diff --git a/tests/vault/gear/scheduler-service-test.cpp b/tests/vault/gear/scheduler-service-test.cpp
index 8db9e7100..d46674b28 100644
--- a/tests/vault/gear/scheduler-service-test.cpp
+++ b/tests/vault/gear/scheduler-service-test.cpp
@@ -26,9 +26,10 @@
 
 
 #include "lib/test/run.hpp"
+#include "activity-detector.hpp"
 #include "vault/gear/scheduler.hpp"
-//#include "lib/time/timevalue.hpp"
-//#include "lib/format-cout.hpp"
+#include "lib/time/timevalue.hpp"
+#include "lib/format-cout.hpp"
 //#include "lib/util.hpp"
 
 //#include <utility>
@@ -44,7 +45,7 @@ namespace test {
   
 //  using lib::time::FrameRate;
 //  using lib::time::Offset;
-//  using lib::time::Time;
+  using lib::time::Time;
   
   
   
@@ -64,8 +65,8 @@ namespace test {
       run (Arg)
         {
            simpleUsage();
+           invokeWorkFunction();
            walkingDeadline();
-           setupLalup();
         }
       
       
@@ -82,13 +83,29 @@ namespace test {
       
       
       
-      /** @test TODO
+      /** @test TODO verify visible behaviour of the work-pulling function
        * @todo WIP 10/23 🔁 define ⟶ implement
        */
       void
-      walkingDeadline()
+      invokeWorkFunction()
         {
-          UNIMPLEMENTED ("walking Deadline");
+          BlockFlowAlloc bFlow;
+          EngineObserver watch;
+          Scheduler scheduler{bFlow, watch};
+          
+          ActivityDetector detector;
+          Activity& probe = detector.buildActivationProbe ("testProbe");
+          
+          // this test class is declared friend to get a backdoor to Scheduler internals...
+          auto& schedCtx = Scheduler::ExecutionCtx::from(scheduler);
+          Time now = schedCtx.getSchedTime();
+          schedCtx.post (now, &probe, schedCtx);
+          
+          CHECK (activity::WAIT == scheduler.getWork());
+          
+          cout << detector.showLog()<<endl; // HINT: use this for investigation...
+          CHECK (detector.verifyInvocation("testProbe"));
+          ////////////////////////////////////////////////////////////////////////////////////TODO need a way to get the actual time passed to the Probe
         }
       
       
@@ -97,8 +114,9 @@ namespace test {
        * @todo WIP 10/23 🔁 define ⟶ implement
        */
       void
-      setupLalup()
+      walkingDeadline()
         {
+          UNIMPLEMENTED ("walking Deadline");
         }
     };
   
diff --git a/wiki/thinkPad.ichthyo.mm b/wiki/thinkPad.ichthyo.mm
index 3c560b776..b839f412a 100644
--- a/wiki/thinkPad.ichthyo.mm
+++ b/wiki/thinkPad.ichthyo.mm
@@ -82224,10 +82224,11 @@ Date:&#160;&#160;&#160;Thu Apr 20 18:53:17 2023 +0200<br/>
 </node>
 <node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1698004014170" ID="ID_359097355" MODIFIED="1698203266998" TEXT="Test">
 <icon BUILTIN="flag-yellow"/>
-<node BACKGROUND_COLOR="#f0d5c5" COLOR="#990033" CREATED="1698203252783" ID="ID_161810851" MODIFIED="1698203272445" TEXT="was kann man hier sinnvoll testen?">
+<node COLOR="#435e98" CREATED="1698203252783" ID="ID_161810851" MODIFIED="1698240150155" TEXT="was kann man hier sinnvoll testen?">
 <icon BUILTIN="help"/>
 <node CREATED="1698203283579" ID="ID_1136913463" MODIFIED="1698203292977" TEXT="der Code macht bereits sleep-Waits"/>
 <node CREATED="1698203293530" ID="ID_507890192" MODIFIED="1698203303180" TEXT="andererseits kann man ihn noch direkt aufrufen"/>
+<node CREATED="1698240055257" ID="ID_1418857353" MODIFIED="1698240100349" TEXT="&#x27f9; Queue best&#xfc;cken und aufrufen &#x2014; Zeit messen"/>
 </node>
 </node>
 </node>
@@ -83115,6 +83116,23 @@ Date:&#160;&#160;&#160;Thu Apr 20 18:53:17 2023 +0200<br/>
 </node>
 <node CREATED="1698078223097" ID="ID_597306541" MODIFIED="1698078227054" TEXT="Schlafen">
 <icon BUILTIN="full-5"/>
+<node COLOR="#435e98" CREATED="1698244765564" FOLDED="true" HGAP="50" ID="ID_28419292" MODIFIED="1698245094135" TEXT="modifiziert auf Redistribution" VSHIFT="10">
+<arrowlink COLOR="#758fa6" DESTINATION="ID_1016395299" ENDARROW="Default" ENDINCLINATION="302;-22;" ID="Arrow_ID_1135387860" STARTARROW="None" STARTINCLINATION="246;369;"/>
+<icon BUILTIN="yes"/>
+<node BACKGROUND_COLOR="#e0ceaa" COLOR="#690f14" CREATED="1698244795607" HGAP="25" ID="ID_928488277" MODIFIED="1698244961675" VSHIFT="16">
+<richcontent TYPE="NODE"><html>
+  <head/>
+  <body>
+    <p>
+      wichtig falls der Scheduler <i>leer f&#228;llt</i>
+    </p>
+  </body>
+</html></richcontent>
+<icon BUILTIN="messagebox_warning"/>
+</node>
+<node CREATED="1698244829665" ID="ID_142654598" MODIFIED="1698244842453" TEXT="sonst k&#xf6;nnte es passieren, da&#xdf; alle Idler in einem Cluster sitzen"/>
+<node CREATED="1698244843729" ID="ID_1518532327" MODIFIED="1698244910572" TEXT="und der n&#xe4;chste Termin vers&#xe4;umt w&#xfc;rde um h&#xf6;chstens [SLEEP_HORIZON - WORK_HORIZON]"/>
+</node>
 </node>
 </node>
 <node CREATED="1698019164588" ID="ID_1369255451" MODIFIED="1698019165160" TEXT="incomingCapacity">
@@ -88084,12 +88102,18 @@ Date:&#160;&#160;&#160;Thu Apr 20 18:53:17 2023 +0200<br/>
 <icon BUILTIN="info"/>
 </node>
 <node CREATED="1698073016039" ID="ID_1742616307" MODIFIED="1698073017507" TEXT="F&#xe4;lle">
-<node COLOR="#338800" CREATED="1698073017869" ID="ID_916925082" MODIFIED="1698073034749" TEXT="classifyTimings">
+<node COLOR="#338800" CREATED="1698073017869" ID="ID_916925082" MODIFIED="1698243342884" TEXT="classifyHorizon">
 <icon BUILTIN="button_ok"/>
 </node>
 <node COLOR="#338800" CREATED="1698073022938" ID="ID_1539653684" MODIFIED="1698073034749" TEXT="tendNextActivity">
 <icon BUILTIN="button_ok"/>
 </node>
+<node COLOR="#338800" CREATED="1698243350367" ID="ID_997422004" MODIFIED="1698243362335" TEXT="classifyCapacity">
+<icon BUILTIN="button_ok"/>
+</node>
+<node COLOR="#338800" CREATED="1698243357550" ID="ID_458370410" MODIFIED="1698243362335" TEXT="scatteredReCheck">
+<icon BUILTIN="button_ok"/>
+</node>
 </node>
 </node>
 <node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1688336835085" ID="ID_1753236898" MODIFIED="1697732777759" TEXT="SchedulerService_test">
@@ -88104,13 +88128,58 @@ Date:&#160;&#160;&#160;Thu Apr 20 18:53:17 2023 +0200<br/>
 <arrowlink COLOR="#ff1924" DESTINATION="ID_996573918" ENDARROW="Default" ENDINCLINATION="-817;60;" ID="Arrow_ID_226641198" STARTARROW="None" STARTINCLINATION="-848;-40;"/>
 <icon BUILTIN="hourglass"/>
 </node>
-<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1697484506891" ID="ID_1292738036" MODIFIED="1697484528227" TEXT="den kompletten Work-Funktor durchspielen">
+<node BACKGROUND_COLOR="#eef0c5" COLOR="#990000" CREATED="1697484506891" ID="ID_1292738036" MODIFIED="1698247370951" TEXT="den kompletten Work-Funktor durchspielen">
+<icon BUILTIN="pencil"/>
+<node CREATED="1698243387222" ID="ID_1151484757" MODIFIED="1698243397453" TEXT="und zwar direkten Aufruf, ohne WorkForce"/>
+<node CREATED="1698243399946" ID="ID_525069730" MODIFIED="1698243412341" TEXT="es kann zu Sleeps kommen"/>
+<node CREATED="1698243426549" ID="ID_1975979569" MODIFIED="1698243431240" TEXT="das bedeutet: Zeitmessung"/>
+<node BACKGROUND_COLOR="#f0d5c5" COLOR="#990033" CREATED="1698243664309" ID="ID_654541946" MODIFIED="1698243687277" TEXT="was kann man sinnvollerweise pr&#xfc;fen?">
+<icon BUILTIN="help"/>
+<node CREATED="1698243697817" ID="ID_83311166" MODIFIED="1698243708627" TEXT="eine eingespiele Activity wird aufgerufen"/>
+<node CREATED="1698243756225" ID="ID_489965107" MODIFIED="1698243775440" TEXT="was f&#xe4;llig ist, wird sofort aufgerufen"/>
+<node CREATED="1698243881573" ID="ID_1520192624" MODIFIED="1698243892539" TEXT="es wird genau eine scheduled Activity aufgerufen"/>
+<node CREATED="1698243927930" ID="ID_1326757783" MODIFIED="1698243935709" TEXT="die Zeit wird in etwa eingehalten"/>
+<node CREATED="1698243794737" ID="ID_1290805695" MODIFIED="1698243800463" TEXT="das Delay-Regime">
+<node CREATED="1698243828655" ID="ID_763249245" MODIFIED="1698243855201" TEXT="Abstand davor &#x27f6; delay"/>
+<node CREATED="1698243897342" ID="ID_1722957398" MODIFIED="1698243904507" TEXT="Abstand danch &#x27f6; delay"/>
+<node CREATED="1698243973380" ID="ID_664100190" MODIFIED="1698244000012" TEXT="tendedNext &#x27f6; re-Fokussiert"/>
+<node CREATED="1698245002134" ID="ID_1016395299" MODIFIED="1698245069840" TEXT="nichts danach &#x27f6; re-Distribution">
+<linktarget COLOR="#758fa6" DESTINATION="ID_1016395299" ENDARROW="Default" ENDINCLINATION="302;-22;" ID="Arrow_ID_1135387860" SOURCE="ID_28419292" STARTARROW="None" STARTINCLINATION="246;369;"/>
+</node>
+<node CREATED="1698245073987" ID="ID_1953896637" MODIFIED="1698247362748" TEXT="leer &#x27f6; Schlaf">
+<icon BUILTIN="button_ok"/>
+</node>
+</node>
+</node>
+<node CREATED="1698245511656" ID="ID_1594716553" MODIFIED="1698245548777" TEXT="Scaffolding">
+<node CREATED="1698245550915" ID="ID_1897821225" MODIFIED="1698245557078" TEXT="verwende ActivityDetector"/>
+<node CREATED="1698245558169" ID="ID_1427917719" MODIFIED="1698245570820" TEXT="aber Problem: an die aktuelle Aufruzeit kommen"/>
+<node COLOR="#5b280f" CREATED="1698245571408" ID="ID_1935211976" MODIFIED="1698245821927" TEXT="Activity::TICK und den execution-Ctx riggen">
+<icon BUILTIN="button_cancel"/>
+<node CREATED="1698245823278" ID="ID_1225266983" MODIFIED="1698245858822" TEXT="geht nicht ... diese Hintert&#xfc;r ist ZU">
+<icon BUILTIN="stop-sign"/>
+</node>
+<node CREATED="1698245835997" ID="ID_43172566" MODIFIED="1698245856760" TEXT="wir haben hier einen fest auf den Scheduler verdrahteten ExecutionCtx">
+<icon BUILTIN="info"/>
+</node>
+</node>
+<node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1698246249997" ID="ID_221908219" MODIFIED="1698246271187" TEXT="mu&#xdf; mir die now-Zeit in ActivityProbe speichern">
 <icon BUILTIN="flag-yellow"/>
+<node CREATED="1698246275186" ID="ID_389803917" MODIFIED="1698246286348" TEXT="bei jedem Aufruf im Objekt speichern"/>
+<node CREATED="1698246286912" ID="ID_1611070007" MODIFIED="1698246292046" TEXT="Zugriffs-Funktion schaffen"/>
+</node>
+</node>
 </node>
 <node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1697473158929" ID="ID_1723058065" MODIFIED="1697484548083" TEXT="vollst&#xe4;ndiger Ende-zu-Ende Test incl. WorkForce">
 <icon BUILTIN="flag-yellow"/>
 </node>
 </node>
+<node CREATED="1698245695072" ID="ID_546920051" MODIFIED="1698245698507" TEXT="Test-Setup">
+<node CREATED="1698245550915" ID="ID_460908396" MODIFIED="1698245557078" TEXT="verwende ActivityDetector"/>
+<node BACKGROUND_COLOR="#eef0c5" COLOR="#990000" CREATED="1698245705360" ID="ID_1236877119" MODIFIED="1698245892414" TEXT="brauche Hintereingang (f&#xfc;r direkt gegebene Activities)">
+<icon BUILTIN="pencil"/>
+</node>
+</node>
 <node CREATED="1697758391611" ID="ID_124711923" MODIFIED="1697758397083" TEXT="F&#xe4;lle">
 <node CREATED="1697758425500" ID="ID_1450418166" MODIFIED="1697758430911" TEXT="simpleUsage">
 <node CREATED="1697758440737" ID="ID_1211803424" MODIFIED="1697758454084" TEXT="zeigt hier vor allem was man braucht"/>
@@ -88118,6 +88187,12 @@ Date:&#160;&#160;&#160;Thu Apr 20 18:53:17 2023 +0200<br/>
 <icon BUILTIN="button_ok"/>
 </node>
 </node>
+<node BACKGROUND_COLOR="#eef0c5" COLOR="#990000" CREATED="1698247388556" ID="ID_1402046356" MODIFIED="1698247391396" TEXT="invokeWorkFunction">
+<icon BUILTIN="pencil"/>
+<node COLOR="#338800" CREATED="1698247394051" ID="ID_198829622" MODIFIED="1698247420009" TEXT="kann einfachen Aufruf einer vorher eingespielten Activity belegen">
+<icon BUILTIN="button_ok"/>
+</node>
+</node>
 </node>
 </node>
 <node BACKGROUND_COLOR="#eee5c3" COLOR="#990000" CREATED="1697755558855" ID="ID_278365674" MODIFIED="1697741858009" TEXT="SchedulerStress_test">