diff --git a/app/vkk/workhours/accounting/departments/__init__.py b/app/vkk/workhours/accounting/departments/__init__.py
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..a195d4368cf57cdd944b0f9ad98b94e9a184ff69 100644
--- a/app/vkk/workhours/accounting/departments/__init__.py
+++ b/app/vkk/workhours/accounting/departments/__init__.py
@@ -0,0 +1,3 @@
+"""
+This module contains the utilities associated with the management of departments.
+"""
\ No newline at end of file
diff --git a/app/vkk/workhours/accounting/departments/forms.py b/app/vkk/workhours/accounting/departments/forms.py
index 2d82a22d35ecf471cd4ad9338ad30aa6a004a9f4..d6ba0e3e83fe0786ba3363f41300cbe8fbdb909c 100644
--- a/app/vkk/workhours/accounting/departments/forms.py
+++ b/app/vkk/workhours/accounting/departments/forms.py
@@ -1,8 +1,14 @@
+"""
+A collection of forms used for managing departments.
+"""
+
 from django.forms import Form, ModelMultipleChoiceField, SelectMultiple
 from vkk.models import Period
 
-
 class EvaluationForm(Form):
+    """
+    A `Form` subclass for selecting one or more `Periods` for evaluation.
+    """
     periods = ModelMultipleChoiceField(
         widget=SelectMultiple(attrs={"style":"height: 20em;"}),
         queryset=Period.objects.all().order_by('-start')
diff --git a/app/vkk/workhours/accounting/departments/urls.py b/app/vkk/workhours/accounting/departments/urls.py
index e0fd7e69074b0f8760ef17b8b2fb4c6c1aa76099..f1835be52b08ce14f5d7e86a4e315e728a05b038 100644
--- a/app/vkk/workhours/accounting/departments/urls.py
+++ b/app/vkk/workhours/accounting/departments/urls.py
@@ -1,3 +1,7 @@
+"""
+This submodule contains the routing configuration.
+"""
+
 from django.urls import path
 from django.utils.translation import gettext_lazy as _
 from ..views import *
diff --git a/app/vkk/workhours/accounting/departments/views.py b/app/vkk/workhours/accounting/departments/views.py
index 1fe9668b2be2dd0ab33a15d722400fd9c028c9a8..f2625cc90ffdf753bae5de5a513dd43200169077 100644
--- a/app/vkk/workhours/accounting/departments/views.py
+++ b/app/vkk/workhours/accounting/departments/views.py
@@ -1,3 +1,7 @@
+"""
+This submodule contains class based views.
+"""
+
 from django.template import loader
 from django.db import connection
 from django.http import HttpResponse
@@ -7,21 +11,20 @@ from .forms import EvaluationForm
 
 
 class EvaluationView(AccountantRequiredMixin, FormView):
+    """
+    A class based `View` providing utilities for generating an evaluation of
+    the given `Department` over some `Periods`.
+    """
     template_name = 'vkk/workhours/accounting/department/evaluation.html'
     form_class = EvaluationForm
 
     def get_queryset(self, periods):
+        """
+        Returns the result of an SQL query calculating the evaluation.
+        """
         with connection.cursor() as cursor:
             cursor.execute("WITH assignments AS ( \
-                    SELECT  \
-                        vkk_project.id AS project_id, \
-                        vkk_project.start AS project_start, \
-                        vkk_project.end AS project_end, \
-                        vkk_projectassignment.id AS assignment_id, \
-                        salary_level_id \
-                    FROM vkk_project JOIN vkk_projectassignment \
-                        ON vkk_project.id = vkk_projectassignment.project_id \
-                    WHERE vkk_project.department_id = %s \
+                    SELECT  \periodsdepartment_id = %s \
                 ), \
                 workhours AS ( \
                     SELECT  \
@@ -249,6 +252,9 @@ class EvaluationView(AccountantRequiredMixin, FormView):
     
 
     def form_valid(self, form):
+        """
+        Returns the result of the evaluation in shape of a `.csv` file.
+        """
         periods = tuple(n[0] for n in form.cleaned_data['periods'].values_list('id'))
         context = self.get_context_data()
         context["projects"] = self.get_queryset(periods)
diff --git a/app/vkk/workhours/accounting/mailing_list/__init__.py b/app/vkk/workhours/accounting/mailing_list/__init__.py
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..6bd44aa6afe2a59384a6bfd57ba773a2462471a1 100644
--- a/app/vkk/workhours/accounting/mailing_list/__init__.py
+++ b/app/vkk/workhours/accounting/mailing_list/__init__.py
@@ -0,0 +1,3 @@
+"""
+This module contains the utilities associated with the management of mailing lists.
+"""
\ No newline at end of file
diff --git a/app/vkk/workhours/accounting/mailing_list/forms.py b/app/vkk/workhours/accounting/mailing_list/forms.py
index f1dfc3ef3f949eb07a5f1cb44331b98da997d5f3..47902d0339bcd0bcb5ee36592b6651ad168ffd1b 100644
--- a/app/vkk/workhours/accounting/mailing_list/forms.py
+++ b/app/vkk/workhours/accounting/mailing_list/forms.py
@@ -1,3 +1,7 @@
+"""
+A collection of forms used for managing mailing lists.
+"""
+
 from smtplib import SMTPException
 from django import forms
 from django.core.mail import send_mail
@@ -11,6 +15,9 @@ MAILING_CHOICES = [
 ]
 
 class MailingListForm(forms.Form):
+    """
+    A `Form` subclass for sending email to different groups `User`s.
+    """
     mailing_list = forms.ChoiceField(label=_('Mailing List'), choices=MAILING_CHOICES)
     subject = forms.CharField(label=_('Subject'), max_length=255, empty_value=True)
     message = forms.CharField(label=_('Message'), max_length=16383, widget=forms.Textarea())
diff --git a/app/vkk/workhours/accounting/mailing_list/urls.py b/app/vkk/workhours/accounting/mailing_list/urls.py
index 6e3ec0e5133a461421a90bb487a20c75d0274fcc..61882e8983fc9e1b22c36f3575de0c77d26fd97d 100644
--- a/app/vkk/workhours/accounting/mailing_list/urls.py
+++ b/app/vkk/workhours/accounting/mailing_list/urls.py
@@ -1,3 +1,7 @@
+"""
+This submodule contains the routing configuration.
+"""
+
 from django.urls import path
 from django.utils.translation import gettext_lazy as _
 from .views import MailingListView, MailingListSuccessView, MailingListFailedView
diff --git a/app/vkk/workhours/accounting/mailing_list/views.py b/app/vkk/workhours/accounting/mailing_list/views.py
index d389ca0505d28820349da2578e69f301eba29138..d1391be082e9ebe66c7dccb746726636258b2d6a 100644
--- a/app/vkk/workhours/accounting/mailing_list/views.py
+++ b/app/vkk/workhours/accounting/mailing_list/views.py
@@ -1,3 +1,7 @@
+"""
+This submodule contains class based views.
+"""
+
 from smtplib import SMTPException
 from django.urls import reverse_lazy, reverse
 from django.http import HttpResponseRedirect
@@ -6,6 +10,9 @@ from vkk.workhours.accounting.mixins import AccountantRequiredMixin
 from .forms import MailingListForm
 
 class MailingListView(AccountantRequiredMixin, FormView):
+    """
+    A class based `View` providing the utilities to send out email to a mailing list.
+    """
     form_class = MailingListForm
     success_url = reverse_lazy('vkk:workhours:accounting:mailing_list:success')
     template_name = 'vkk/workhours/accounting/mailing_list/form.html'
@@ -20,7 +27,15 @@ class MailingListView(AccountantRequiredMixin, FormView):
         return super().form_valid(form)
 
 class MailingListSuccessView(AccountantRequiredMixin, TemplateView):
+    """
+    A class based `View` providing the utilities to indicate the successful delivery
+    of email to a mailing list.
+    """
     template_name = 'vkk/workhours/accounting/mailing_list/success.html'
 
 class MailingListFailedView(AccountantRequiredMixin, TemplateView):
+    """
+    A class based `View` providing the utilities to indicate the failure to 
+    send out email to a mailing list.
+    """
     template_name = 'vkk/workhours/accounting/mailing_list/failed.html'