diff --git a/lib/rubella/weighting/per_overall_load.rb b/lib/rubella/weighting/per_overall_load.rb
index 073cdf5..63d8e35 100644
--- a/lib/rubella/weighting/per_overall_load.rb
+++ b/lib/rubella/weighting/per_overall_load.rb
@@ -1,7 +1,54 @@
+require "rubella/weighting/base"
+
 module Rubella
   module Weighting
 
-    class PerOverallLoad
+    # The Rubella::Weighting::PerOverallValue object summarizes the load of all
+    # cores in a time and computes how much load is one percent. Then it uses
+    # this as factor to weight the summarized load of every bucket.
+    # So your representation will show you the higher load cores more
+    # intensive, then the cores with lower load, depending on the current load.
+    #
+    class PerOverallLoad < Base
+
+      # Creates a output readable list.
+      # This list is Array within a subarrays, which contain the buckets for
+      # every time value unit.
+      #
+      # @param input Rubella::Input An input object
+      # @return Rubella::Storage
+      def parse input
+        data = input.data
+        # no data, no work
+        return [] if data.length == 0
+
+        # prepare data
+        data_list = Array.new()
+
+        data.each do |cores|
+
+          # Add all loads to compute how much % is one % load
+          load_sum = 0
+          cores.each { |core| load_sum = load_sum + core }
+          percent_load = 100.0/load_sum
+
+          # every 10 load percent one heatpoint
+          i = 0
+          data_list << Array.new(buckets) do
+            # Select all current cores
+            selected_cores = cores.select { |core| core >= i and core < (i+@steps)}
+            i = i + @steps
+
+            # add the load of the resulting cores and multiply it with the overall value
+            load_sum = 0
+            selected_cores.each { |core| load_sum = load_sum + core }
+            (load_sum.to_f*percent_load)/100
+          end
+        end
+
+        Rubella::Storage.new data_list
+      end
+
     end
 
   end