diff --git a/partition_setting.lua b/partition_setting.lua
new file mode 100644
index 0000000..f4e8541
--- /dev/null
+++ b/partition_setting.lua
@@ -0,0 +1,79 @@
+function partition_setting (job_desc, submit_uid, infinite, seventyfive, parallel, serial) 
+
+  local partition = job_desc.partition 
+  local debugmode = scitas_debug (job_desc)
+ 
+  -- First case: The user has not declared a partition or a reservation
+  if job_desc.partition == nil and job_desc.reservation == nil then
+    if debugmode == 1 then
+      slurm.log_user("partition_setting: first case")
+    end  
+    -- Second case: The user has required one node (or slurm resolve it) 
+    if job_desc.max_nodes <= 1 then 
+      if debugmode == 1 then
+        slurm.log_user("partition_setting: second case")
+      end
+      -- Third case: The user has required an exclusive node
+      if job_desc.shared == 1 then
+        if debugmode == 1 then
+          slurm.log_user("partition_setting: third case")
+        end
+        partition = parallel
+      else
+         -- At this point, we have no partition, no reservation, one node not exclusive
+         -- Check the number of cores
+         -- Fourth case: The user has required less than 75 % of a node
+         if job_desc.min_cpus <= seventyfive then
+           if debugmode == 1 then
+             slurm.log_user("partition_setting: fourth case")
+           end
+           partition = serial 
+         else
+           -- Fifth case: The user has required more than 75 % of a node not exclusive
+           if debugmode == 1 then
+             slurm.log_user("partition_setting: fifth case")
+           end
+           partition = parallel
+         end
+      end
+    else
+      -- Sixth case: The user has required more than one node
+      if job_desc.max_nodes ~= infinite then
+        if debugmode == 1 then
+          slurm.log_user("partition_setting: sixth case")
+        end  
+        partition = parallel
+      else 
+        -- Seventh case: The user not required a number of nodes
+        if debugmode == 1 then
+          slurm.log_user("partition_setting: seventh case")   
+        end
+        if job_desc.min_cpus <= seventyfive then
+          partition = serial
+        else
+          partition = parallel
+        end 
+      end
+    end
+  end
+
+  -- Eighth case: The user required less than 75 % of one non exclusive node and 
+  -- has declared the parallel partition outside of a reservation 
+  if job_desc.partition == parallel and 
+    job_desc.max_nodes == 1 and
+    job_desc.reservation == nil and
+    job_desc.min_cpus <= seventyfive and 
+    job_desc.shared ~= 0 then 
+     
+    if debugmode == 1 then
+      slurm.log_user("partition_setting: eighth case")
+    end
+    partition =  serial
+  end  
+
+  if debugmode == 1 then
+    slurm.log_user("partition_setting: setting partition: %s",partition) 
+  end
+   
+  return partition  
+end