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diff --git a/docs/gap_analysis/301-Impact_Analysis.rst b/docs/gap_analysis/301-Impact_Analysis.rst
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+===============
+Impact Analysis
+===============
+
+Upgrading the different software modules may cause different impact on
+the availability of the infrastructure resources and even on the service
+continuity of the vNFs.
+
+**Software modules in the computing nodes**
+
+#. Host OS patch
+
+#. Hypervisor, such as KVM, QEMU, XEN, libvirt
+#. Openstack agent in computing nodes (like Nova agent, Ceilometer
+   agent...)
+
+.. <MT> As SW module, we should list the host OS and maybe its
+   drivers as well. From upgrade perspective do we limit host OS
+   upgrades to patches only?
+
+**Software modules in network nodes**
+
+#. Neutron L2/L3 agent
+#. OVS, SR-IOV Driver
+
+**Software modules storage nodes**
+
+#. Ceph
+
+The table below analyses such an impact - considering a single instance
+of each software module - from the following aspects:
+
+-  the function which will be lost during upgrade,
+-  the duration of the loss of this specific function,
+-  if this causes the loss of the vNF function,
+-  if it causes incompatibility in the different parts of the software,
+-  what should be backed up before the upgrade,
+-  the duration of restoration time if the upgrade fails
+
+These values provided come from internal testing and based on some
+assumptions, they may vary depending on the deployment techniques.
+Please feel free to add if you find more efficient values during your
+testing.
+
+https://wiki.opnfv.org/_media/upgrade_analysis_v0.5.xlsx
+
+Note that no redundancy of the software modules is considered in the table.
diff --git a/docs/gap_analysis/etc/conf.py b/docs/gap_analysis/etc/conf.py
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+++ b/docs/gap_analysis/etc/conf.py
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+import datetime
+import sys
+import os
+
+try:
+    __import__('imp').find_module('sphinx.ext.numfig')
+    extensions = ['sphinx.ext.numfig']
+except ImportError:
+    # 'pip install sphinx_numfig'
+    extensions = ['sphinx_numfig']
+
+# numfig:
+number_figures = True
+figure_caption_prefix = "Fig."
+
+source_suffix = '.rst'
+master_doc = 'index'
+pygments_style = 'sphinx'
+html_use_index = False
+
+pdf_documents = [('index', u'OPNFV', u'OPNFV Project', u'OPNFV')]
+pdf_fit_mode = "shrink"
+pdf_stylesheets = ['sphinx','kerning','a4']
+#latex_domain_indices = False
+#latex_use_modindex = False
+
+latex_elements = {
+    'printindex': '',
+}
+
+project = u'OPNFV: Template documentation config'
+copyright = u'%s, OPNFV' % datetime.date.today().year
+version = u'1.0.0'
+release = u'1.0.0'
diff --git a/docs/gap_analysis/etc/opnfv-logo.png b/docs/gap_analysis/etc/opnfv-logo.png
new file mode 100644
index 0000000..1519503
--- /dev/null
+++ b/docs/gap_analysis/etc/opnfv-logo.png
diff --git a/docs/gap_analysis/index.rst b/docs/gap_analysis/index.rst
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index 0000000..e6018f6
--- /dev/null
+++ b/docs/gap_analysis/index.rst
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+.. OPNFV Release Engineering documentation, created by
+   sphinx-quickstart on Tue Jun  9 19:12:31 2015.
+   You can adapt this file completely to your liking, but it should at least
+   contain the root `toctree` directive.
+
+.. image:: etc/opnfv-logo.png
+  :height: 40
+  :width: 200
+  :alt: OPNFV
+  :align: left
+
+ESCALATOR GAP ANALYSIS REPORT
+=======================================
+
+Contents:
+
+.. toctree::
+   :maxdepth: 4
+   :titlesonly:
+
+
+
+
+   301-Impact_Analysis.rst
+
+* :ref:`search`
+
+Revision: _sha1_
+
+Build date: |today|