diff --git a/mephisto/data_model/task_run.py b/mephisto/data_model/task_run.py
index 476cc917b..01230d6a5 100644
--- a/mephisto/data_model/task_run.py
+++ b/mephisto/data_model/task_run.py
@@ -125,6 +125,26 @@ class TaskRunArgs:
             )
         },
     )
+    unit_scheduling_strategy: str = field(
+        default="FIFO",
+        metadata={
+            "help": (
+                "Strategy that determines the scheduling strategy for units."
+                "Can be 'FIFO', 'LIFO' or 'Random'."
+            )
+        }
+    )
+    scheduler_prefer_assigned_assignments: bool = field(
+        default=True,
+        metadata={
+            "help": (
+                "Determines if units in assignments with at least one already"
+                "assigned unit are preferred over all other units. This is"
+                "usefull for concurrent tasks as this leads to shorter wait"
+                "times."
+            )
+        }
+    )
 
     post_install_script: str = field(
         default="",
diff --git a/mephisto/operations/worker_pool.py b/mephisto/operations/worker_pool.py
index 3b88e431d..cd81536b0 100644
--- a/mephisto/operations/worker_pool.py
+++ b/mephisto/operations/worker_pool.py
@@ -24,7 +24,7 @@
     GOLD_UNIT_INDEX,
 )
 from mephisto.operations.datatypes import LiveTaskRun, WorkerFailureReasons
-from mephisto.operations.unit_scheduler import FIFOUnitScheduler
+from mephisto.operations.unit_scheduler import FIFOUnitScheduler, LIFOUnitScheduler, RandomUnitScheduler
 
 from typing import Sequence, Dict, Union, Optional, List, Any, TYPE_CHECKING
 
@@ -119,7 +119,18 @@ def register_run(self, live_run: "LiveTaskRun") -> None:
             self._live_run is None
         ), "Cannot associate more than one live run to a worker pool at a time"
         self._live_run = live_run
-        self.unit_scheduler = FIFOUnitScheduler(live_run.task_run, prefer_assigned_assignments=True)
+        scheduling_strategy = live_run.task_run.args.task.unit_scheduling_strategy
+        prefer_assigned_assignments = live_run.task_run.args.task.scheduler_prefer_assigned_assignments
+
+        if(scheduling_strategy == "FIFO"):
+            self.unit_scheduler = FIFOUnitScheduler(live_run.task_run, prefer_assigned_assignments)
+        elif(scheduling_strategy == "LIFO"):
+            self.unit_scheduler = LIFOUnitScheduler(live_run.task_run, prefer_assigned_assignments)
+        elif(scheduling_strategy == "Random"):
+            self.unit_scheduler = RandomUnitScheduler(live_run.task_run, prefer_assigned_assignments)
+        else:
+            raise "Unknown scheduling strategy"
+
 
     def get_live_run(self) -> "LiveTaskRun":
         """Get the associated live run for this worker pool, asserting it's set"""