diff --git a/fltk/launch.py b/fltk/launch.py
index df90ec77..08e85bc9 100644
--- a/fltk/launch.py
+++ b/fltk/launch.py
@@ -1,7 +1,7 @@
 # pylint: disable=unused-argument
 import logging
 import os
-from typing import Callable, Optional, NewType
+from typing import Callable, Optional, NewType, Any, List, Tuple, Dict
 
 from argparse import Namespace
 from multiprocessing.pool import ThreadPool
@@ -11,7 +11,7 @@
 from kubernetes import config
 from torch.distributed import rpc
 from fltk.core.distributed import DistClient, download_datasets
-from fltk.util.config.definitions.orchestrator import get_orchestrator, get_arrival_generator
+from fltk.util.config.definitions.orchestrator import get_orchestrator, get_arrival_generator, OrchestratorType
 from fltk.core import Client, Federator
 from fltk.nets.util.reproducability import init_reproducibility, init_learning_reproducibility
 from fltk.util.cluster.client import ClusterManager
@@ -64,7 +64,23 @@ def exec_distributed_client(task_id: str, conf: DistributedConfig = None,
     print(epoch_data)
 
 
-def exec_orchestrator(args: Namespace = None, conf: DistributedConfig = None, replication: int = 1):
+def get_arrival_generator_args(conf: DistributedConfig, replication: int) -> Tuple[List[Any], Dict[str, Any]]:
+    """
+    Function to get arrival generator arguments based on current configuration of Orchestrator.
+    @param conf:
+    @type conf:
+    @param replication:
+    @type replication:
+    @return: Configuration for args and kwargs for the generator.
+    @rtype: Tuple[List[Any], Dict[str, Any]]
+    """
+    args, kwargs = [conf.get_duration()], {}
+    if conf.cluster_config.orchestrator.orchestrator_type == OrchestratorType.BATCH:
+        kwargs['seed'] = conf.execution_config.reproducibility.seeds[replication]
+    return args, kwargs
+
+
+def exec_orchestrator(args: Namespace = None, conf: DistributedConfig = None, replication: int = 0):
     """
     Default runner for the Orchestrator that is based on KubeFlow
     @param args: Commandline arguments passed to the execution. Might be removed in a future commit.
@@ -72,7 +88,7 @@ def exec_orchestrator(args: Namespace = None, conf: DistributedConfig = None, re
     @param conf: Configuration for execution of Orchestrators components, needed for spinning up components of the
     Orchestrator.
     @type conf: Optional[DistributedConfig]
-    @param replication: Replication index of the experiment.
+    @param replication: Replication index of the experiment, zero indexed.
     @type replication: int
     @return: None
     @rtype: None
@@ -100,7 +116,8 @@ def exec_orchestrator(args: Namespace = None, conf: DistributedConfig = None, re
     pool.apply(cluster_manager.start)
 
     logging.info("Starting arrival generator")
-    pool.apply_async(arrival_generator.start, args=[conf.get_duration()])
+    arv_gen_args, arv_gen_kwargs = get_arrival_generator_args(conf, replication)
+    pool.apply_async(arrival_generator.start, args=arv_gen_args, kwds=arv_gen_kwargs)
     logging.info("Starting orchestrator")
     pool.apply(orchestrator.run, kwds={"experiment_replication": replication})
 
@@ -323,7 +340,7 @@ def launch_cluster(arg_path: Path, conf_path: Path, rank: Rank, nic: Optional[NI
         try:
             logging.info(f"Starting with experiment replication: {replication} with seed: {experiment_seed}")
             init_reproducibility(conf.execution_config)
-            exec_orchestrator(args=args, conf=conf, replication=replication+1)
+            exec_orchestrator(args=args, conf=conf, replication=replication)
         except Exception as e:
             logging.info(f"Execution of replication {replication} with seed {experiment_seed} failed."
                          f"Reason: {e}")