diff --git a/app/lib/articles_csv.rb b/app/lib/articles_csv.rb
index 9e6b4f40..55bc7fc5 100644
--- a/app/lib/articles_csv.rb
+++ b/app/lib/articles_csv.rb
@@ -1,4 +1,4 @@
-class ArticlesCsv < RenderCSV
+class ArticlesCsv < RenderCsv
   include ApplicationHelper
 
   def header
diff --git a/app/lib/bank_transactions_csv.rb b/app/lib/bank_transactions_csv.rb
index 34c39403..4adbc192 100644
--- a/app/lib/bank_transactions_csv.rb
+++ b/app/lib/bank_transactions_csv.rb
@@ -1,6 +1,6 @@
 require 'csv'
 
-class BankTransactionsCsv < RenderCSV
+class BankTransactionsCsv < RenderCsv
   include ApplicationHelper
 
   def header
diff --git a/app/lib/financial_transactions_csv.rb b/app/lib/financial_transactions_csv.rb
index dc21d892..fc12d000 100644
--- a/app/lib/financial_transactions_csv.rb
+++ b/app/lib/financial_transactions_csv.rb
@@ -1,6 +1,6 @@
 require 'csv'
 
-class FinancialTransactionsCsv < RenderCSV
+class FinancialTransactionsCsv < RenderCsv
   include ApplicationHelper
 
   def header
diff --git a/app/lib/invoices_csv.rb b/app/lib/invoices_csv.rb
index ebd1f0a9..eecad298 100644
--- a/app/lib/invoices_csv.rb
+++ b/app/lib/invoices_csv.rb
@@ -1,6 +1,6 @@
 require 'csv'
 
-class InvoicesCsv < RenderCSV
+class InvoicesCsv < RenderCsv
   include ApplicationHelper
 
   def header
diff --git a/app/lib/order_csv.rb b/app/lib/order_csv.rb
index 6ec96581..b238f90c 100644
--- a/app/lib/order_csv.rb
+++ b/app/lib/order_csv.rb
@@ -1,6 +1,6 @@
 require 'csv'
 
-class OrderCsv < RenderCSV
+class OrderCsv < RenderCsv
   def header
     [
       OrderArticle.human_attribute_name(:units_to_order),
diff --git a/app/lib/order_pdf.rb b/app/lib/order_pdf.rb
index 8e30ea84..164be66b 100644
--- a/app/lib/order_pdf.rb
+++ b/app/lib/order_pdf.rb
@@ -1,4 +1,4 @@
-class OrderPDF < RenderPDF
+class OrderPdf < RenderPdf
   attr_reader :order
 
   def initialize(order, options = {})
@@ -55,7 +55,7 @@ class OrderPDF < RenderPDF
   end
 
   def group_order_article_quantity_with_tolerance(goa)
-    goa.tolerance > 0 ? "#{goa.quantity} + #{goa.tolerance}" : goa.quantity.to_s
+    goa.tolerance > 0 ? "#{goa.quantity} + #{goa.tolerance}" : "#{goa.quantity}"
   end
 
   def group_order_article_result(goa)
@@ -88,7 +88,7 @@ class OrderPDF < RenderPDF
              .pluck('groups.name', 'SUM(group_orders.price)', 'ordergroup_id', 'SUM(group_orders.transport)')
 
     result.map do |item|
-      [item.first || stock_ordergroup_name] + item[1..]
+      [item.first || stock_ordergroup_name] + item[1..-1]
     end
   end
 
@@ -103,7 +103,7 @@ class OrderPDF < RenderPDF
   def each_ordergroup_batch(batch_size)
     offset = 0
 
-    loop do
+    while true
       go_records = ordergroups(offset, batch_size)
 
       break unless go_records.any?
diff --git a/app/lib/ordergroups_csv.rb b/app/lib/ordergroups_csv.rb
index 71a9aaa7..f6fba00f 100644
--- a/app/lib/ordergroups_csv.rb
+++ b/app/lib/ordergroups_csv.rb
@@ -1,4 +1,4 @@
-class OrdergroupsCsv < RenderCSV
+class OrdergroupsCsv < RenderCsv
   include ApplicationHelper
 
   def header
diff --git a/app/lib/render_csv.rb b/app/lib/render_csv.rb
index b900f1f7..1f20b075 100644
--- a/app/lib/render_csv.rb
+++ b/app/lib/render_csv.rb
@@ -1,6 +1,6 @@
 require 'csv'
 
-class RenderCSV
+class RenderCsv
   include ActionView::Helpers::NumberHelper
 
   def initialize(object, options = {})
diff --git a/app/lib/render_pdf.rb b/app/lib/render_pdf.rb
index aed04011..479dc4a3 100644
--- a/app/lib/render_pdf.rb
+++ b/app/lib/render_pdf.rb
@@ -52,7 +52,7 @@ class RotatedCell < Prawn::Table::Cell::Text
   end
 end
 
-class RenderPDF < Prawn::Document
+class RenderPdf < Prawn::Document
   include ActionView::Helpers::NumberHelper
   include ApplicationHelper
 
diff --git a/app/lib/users_csv.rb b/app/lib/users_csv.rb
index 56ec3a23..a7d54698 100644
--- a/app/lib/users_csv.rb
+++ b/app/lib/users_csv.rb
@@ -1,4 +1,4 @@
-class UsersCsv < RenderCSV
+class UsersCsv < RenderCsv
   include ApplicationHelper
 
   def header
diff --git a/config/initializers/zeitwerk.rb b/config/initializers/zeitwerk.rb
index 155d7702..9c505a26 100644
--- a/config/initializers/zeitwerk.rb
+++ b/config/initializers/zeitwerk.rb
@@ -1,3 +1,5 @@
+# config/initializers/zeitwerk.rb
 ActiveSupport::Dependencies
   .autoload_paths
   .delete("#{Rails.root}/app/controllers/concerns")
+  
\ No newline at end of file