diff --git a/.reek b/.reek
new file mode 100644
index 000000000..6926df187
--- /dev/null
+++ b/.reek
@@ -0,0 +1,7 @@
+---
+# this file should be name reel.yml in reek 5
+#Detectors: # reek 5
+DuplicateMethodCall:
+  max_calls: 2
+TooManyStatements:
+  max_statements: 8 # to be more consistent with rubocop Metrics/MethodLength: 10
\ No newline at end of file
diff --git a/Gemfile b/Gemfile
index 003a9923d..31a96a780 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,6 +1,6 @@
 source 'https://rubygems.org'
 
-ruby '2.3.1'
+ruby '~>2.3.1'
 
 gem 'rhcl', '>= 0.1.0'
 
diff --git a/Readme.md b/Readme.md
index b89fe503e..3dc38055a 100644
--- a/Readme.md
+++ b/Readme.md
@@ -582,11 +582,11 @@ or in multiple files. An example file can be found at [/lib/coa_env_bootstrapper
 It can contain up to 8 main keys:
 
 * inactive_steps, _optional_: pass a list of steps that will be deactivated in case you wouldn't need them to run, for instance in case you have some resources already installed. You can deactivate:
-    * deploy_transiant_infra: you can deactivate this step if you already have an infrastructure with BOSH and Concourse
+    * deploy_transient_infra: you can deactivate this step if you already have an infrastructure with BOSH and Concourse
     * upload_stemcell: you can deactivate this step if you don't want a new stemcell to be uploaded to the BOSH Director
     * upload_cloud_config: you can deactivate this step if you don't want to overwrite the cloud config of the BOSH Director
     * install_git_server: you can deactivate this step if you have the git-server deployment already deployed on the BOSH Director
-* bucc, _optional_: you have to pass this key unless you deactivate the deploy_transiant_infra step:
+* bucc, _optional_: you have to pass this key unless you deactivate the deploy_transient_infra step:
     * bin_path: the path to your installation of the bucc project. The project can be found at [https://github.com/starkandwayne/bucc](https://github.com/starkandwayne/bucc)
     * cpi: the cpi you want to use for the deployment. The list of existing CPIs can be found on the bucc GitHub project
     * cpi_specific_options: options you want to pass to the bucc CLI for the bucc deployment
@@ -598,12 +598,12 @@ It can contain up to 8 main keys:
 * git_server_manifest, _mandatory_:  a BOSH manifest to deploy the git-server deployment. The example one can be used to be deployed with VirtualBox, in any other case, you will want to adapt it for your IaaS.
 * cloud_config, _optional_: you have to pass this key unless you deactivate the "upload_cloud_config" step. This will be used by the BOSH CLI to upload a cloud-config to the BOSH Director
 * pipeline_credentials, _mandatory_: this passes a list of credentials that will by used by fly to upload the pipelines to Concourse.
-* concourse, _optional_: you have to pass this object if you deactivated the deploy_transiant_infra step or if you want to overwrite the BUCC Concourse and want to use another one. The options are self-explanatory.
+* concourse, _optional_: you have to pass this object if you deactivated the deploy_transient_infra step or if you want to overwrite the BUCC Concourse and want to use another one. The options are self-explanatory.
     * target
     * url
     * username
     * password
-* bosh, _optional_: you have to pass this key if you deactivate the deploy_transiant_infra step or if you want to overwrite BUCC's BOSH and want to use another one. The options are self-explanatory.
+* bosh, _optional_: you have to pass this key if you deactivate the deploy_transient_infra step or if you want to overwrite BUCC's BOSH and want to use another one. The options are self-explanatory.
     * bosh_environment
     * bosh_client
     * bosh_client_secret
diff --git a/ci/bootstrap_coa_env/prereqs.yml b/ci/bootstrap_coa_env/prereqs.yml
index 7d0a39c21..23a225241 100644
--- a/ci/bootstrap_coa_env/prereqs.yml
+++ b/ci/bootstrap_coa_env/prereqs.yml
@@ -1,5 +1,5 @@
 inactive_steps:
-  - deploy_transiant_infra
+  - deploy_transient_infra
   - upload_stemcell
   # - upload_cloud_config
   # - install_git_server
diff --git a/lib/bosh_certificates.rb b/lib/bosh_certificates.rb
index 67ccda9de..80e90be1c 100644
--- a/lib/bosh_certificates.rb
+++ b/lib/bosh_certificates.rb
@@ -1,5 +1,6 @@
 require 'openssl'
 
+# Create or load SSL certificates to be able to connect to a Bosh Director
 class BoshCertificates
   attr_reader :base_dir, :bosh_cert_hash, :certs
 
diff --git a/lib/coa_env_bootstrapper.rb b/lib/coa_env_bootstrapper.rb
index 800626546..b0a0065b2 100644
--- a/lib/coa_env_bootstrapper.rb
+++ b/lib/coa_env_bootstrapper.rb
@@ -1,5 +1,6 @@
 require 'pathname'
 
+# Bootstrap an new COA environment from scratch
 module CoaEnvBootstrapper
   require_relative './coa_env_bootstrapper/base'
   require_relative './coa_env_bootstrapper/bosh'
diff --git a/lib/coa_env_bootstrapper/base.rb b/lib/coa_env_bootstrapper/base.rb
index f93be156f..0c3df4520 100644
--- a/lib/coa_env_bootstrapper/base.rb
+++ b/lib/coa_env_bootstrapper/base.rb
@@ -28,11 +28,11 @@ def self.run(prereqs_path)
     def run
       @config_dir = Dir.mktmpdir
       write_source_profile
-      env_creator_adapter.deploy_transiant_infra unless inactive_step?("deploy_transiant_infra")
+      env_creator_adapter.deploy_transient_infra unless inactive_step?("deploy_transient_infra")
       prepare_bosh_environment
       prepare_git_environment
       run_pipeline_jobs
-      env_creator_adapter.display_concourse_login_information unless inactive_step?("deploy_transiant_infra")
+      env_creator_adapter.display_concourse_login_information unless inactive_step?("deploy_transient_infra")
     end
 
     def generated_concourse_credentials
diff --git a/lib/coa_env_bootstrapper/bosh.rb b/lib/coa_env_bootstrapper/bosh.rb
index b3079e3ea..57c9e0473 100644
--- a/lib/coa_env_bootstrapper/bosh.rb
+++ b/lib/coa_env_bootstrapper/bosh.rb
@@ -1,6 +1,7 @@
 require_relative './command_runner'
 
 module CoaEnvBootstrapper
+  # Manage interaction with a Bosh Director (stemcell upload, cloud config, prerequisite deployment,etc..) during bootstrap
   class Bosh
     include CommandRunner
 
diff --git a/lib/coa_env_bootstrapper/bucc.rb b/lib/coa_env_bootstrapper/bucc.rb
index 58d2f46f9..4f0576fd8 100644
--- a/lib/coa_env_bootstrapper/bucc.rb
+++ b/lib/coa_env_bootstrapper/bucc.rb
@@ -3,6 +3,7 @@
 require_relative './errors'
 
 module CoaEnvBootstrapper
+  # Manage BUCC deployment
   class Bucc
     include CommandRunner
     attr_reader :prereqs
@@ -11,7 +12,7 @@ def initialize(prereqs)
       @prereqs = prereqs || {}
     end
 
-    def deploy_transiant_infra
+    def deploy_transient_infra
       run_cmd "#{bucc_cli_path} up --cpi #{prereqs['cpi']} \
 #{prereqs['cpi_specific_options']} --lite --debug"
     end
diff --git a/lib/coa_env_bootstrapper/command_runner.rb b/lib/coa_env_bootstrapper/command_runner.rb
index 4701ed9ce..382226541 100644
--- a/lib/coa_env_bootstrapper/command_runner.rb
+++ b/lib/coa_env_bootstrapper/command_runner.rb
@@ -1,6 +1,7 @@
 require 'open3'
 
 module CoaEnvBootstrapper
+  # Base class for executing command and checking command result
   module CommandRunner
     def run_cmd(cmd, opts = {})
       source_file_path = opts[:source_file_path]
@@ -10,7 +11,7 @@ def run_cmd(cmd, opts = {})
 
       write_header(cmd, ignore_error)
       stdout, stderr, status = Open3.capture3(cmd)
-      determine_sucess(stdout, stderr, status, ignore_error)
+      determine_success(stdout, stderr, status, ignore_error)
 
       stdout
     end
@@ -24,9 +25,9 @@ def write_header(command, error_ignored)
       puts "while ignoring errors." if error_ignored
     end
 
-    def determine_sucess(stdout, stderr, status, error_ignored)
+    def determine_success(stdout, stderr, status, error_ignored)
       if status.success?
-        puts "Command ran succesfully with the following output:", stdout
+        puts "Command ran successfully with the following output:", stdout
       elsif error_ignored
         puts "Command errored, but continuing:", "stderr:", stderr, "stdout:", stdout
       else
diff --git a/lib/coa_env_bootstrapper/concourse.rb b/lib/coa_env_bootstrapper/concourse.rb
index cf3626055..7c8161870 100644
--- a/lib/coa_env_bootstrapper/concourse.rb
+++ b/lib/coa_env_bootstrapper/concourse.rb
@@ -2,6 +2,7 @@
 require_relative '../coa_env_bootstrapper'
 
 module CoaEnvBootstrapper
+  # Manage interactions with concourse during bootstrap
   class Concourse
     include CommandRunner
 
diff --git a/lib/coa_env_bootstrapper/env_creator_adapter.rb b/lib/coa_env_bootstrapper/env_creator_adapter.rb
index b15780dd8..ce37a4785 100644
--- a/lib/coa_env_bootstrapper/env_creator_adapter.rb
+++ b/lib/coa_env_bootstrapper/env_creator_adapter.rb
@@ -16,8 +16,8 @@ def initialize(adapter_name, prereqs)
         end
     end
 
-    def deploy_transiant_infra
-      adapter.deploy_transiant_infra
+    def deploy_transient_infra
+      adapter.deploy_transient_infra
     end
 
     def vars
diff --git a/lib/coa_env_bootstrapper/errors.rb b/lib/coa_env_bootstrapper/errors.rb
index 447bfff84..9deda962d 100644
--- a/lib/coa_env_bootstrapper/errors.rb
+++ b/lib/coa_env_bootstrapper/errors.rb
@@ -1,4 +1,5 @@
 module CoaEnvBootstrapper
+  # Error raised by BUCC
   class BuccCommandError < StandardError; end
   class EnvCreatorAdapterNotImplementedError < StandardError; end
   class ConfigDirNotFound < StandardError
diff --git a/lib/coa_env_bootstrapper/git.rb b/lib/coa_env_bootstrapper/git.rb
index bb0e442ce..84711db48 100644
--- a/lib/coa_env_bootstrapper/git.rb
+++ b/lib/coa_env_bootstrapper/git.rb
@@ -2,6 +2,7 @@
 require_relative './errors'
 
 module CoaEnvBootstrapper
+  # Manage interaction with COA embedded git repository
   class Git
     include CommandRunner
     attr_reader :ceb
diff --git a/lib/coa_env_bootstrapper/prereqs.example.yml b/lib/coa_env_bootstrapper/prereqs.example.yml
index ac349abf6..9507bc467 100644
--- a/lib/coa_env_bootstrapper/prereqs.example.yml
+++ b/lib/coa_env_bootstrapper/prereqs.example.yml
@@ -1,7 +1,7 @@
 # With this key you can deactive some of the steps of the script, if you've got
 # some elements installed already.
 inactive_steps: []
-    # - deploy_transiant_infra
+    # - deploy_transient_infra
     # - upload_stemcell
     # - upload_cloud_config
     # - install_git_server
diff --git a/scripts/extract_pipeline_credentials_list.rb b/scripts/extract_pipeline_credentials_list.rb
index 90db6b45c..39e77324e 100755
--- a/scripts/extract_pipeline_credentials_list.rb
+++ b/scripts/extract_pipeline_credentials_list.rb
@@ -1,21 +1,24 @@
 #!/usr/bin/env ruby -w
 
-def credential_list(pipelines_path)
-  creds_list = []
+# scan pipelines to list concourse variables
+class CredentialsList
+  def self.list(pipelines_path)
+    creds_list = []
 
-  files = File.directory?(pipelines_path) ? Dir["#{pipelines_path}/*"] : [pipelines_path]
+    files = File.directory?(pipelines_path) ? Dir["#{pipelines_path}/*"] : [pipelines_path]
 
-  files.each do |path|
-    next if File.directory?(path)
-    pipeline_content = File.read(path)
-    creds_list << pipeline_content.scan(%r{\(\(([\w|-]*)\)\)}).flatten.uniq
-  end
+    files.each do |path|
+      next if File.directory?(path)
+      pipeline_content = File.read(path)
+      creds_list << pipeline_content.scan(/\(\(([\w|-]*)\)\)/).flatten.uniq
+    end
 
-  creds_list.flatten.uniq.sort
+    creds_list.flatten.uniq.sort
+  end
 end
 
 if (path = ARGV[0])
-  creds = credential_list(path)
+  creds = CredentialsList.list(path)
   puts "Found credentials in alphabetical order:"
   puts creds.join("\n")
 else
diff --git a/spec/lib/coa_env_bootstrapper/base_spec.rb b/spec/lib/coa_env_bootstrapper/base_spec.rb
index 970600ff5..967652c69 100644
--- a/spec/lib/coa_env_bootstrapper/base_spec.rb
+++ b/spec/lib/coa_env_bootstrapper/base_spec.rb
@@ -32,7 +32,7 @@
       let(:ceb) { described_class.new([]) }
 
       it "runs all steps" do
-        allow(ceb.env_creator_adapter).to receive(:deploy_transiant_infra)
+        allow(ceb.env_creator_adapter).to receive(:deploy_transient_infra)
         allow(ceb).to receive(:write_source_profile)
         allow(ceb.bosh).to receive(:upload_stemcell)
         allow(ceb.bosh).to receive(:upload_cloud_config)
@@ -49,7 +49,7 @@
 
         ceb.run
 
-        expect(ceb.env_creator_adapter).to have_received(:deploy_transiant_infra)
+        expect(ceb.env_creator_adapter).to have_received(:deploy_transient_infra)
         expect(ceb).to have_received(:write_source_profile)
         expect(ceb.bosh).to have_received(:upload_stemcell)
         expect(ceb.bosh).to have_received(:upload_cloud_config)
@@ -70,7 +70,7 @@
       let(:ceb) { described_class.new([inactive_steps_yml_path]) }
 
       it "ignores the deactivated steps" do
-        allow(ceb.env_creator_adapter).to receive(:deploy_transiant_infra)
+        allow(ceb.env_creator_adapter).to receive(:deploy_transient_infra)
         allow(ceb).to receive(:write_source_profile)
         allow(ceb.bosh).to receive(:upload_stemcell)
         allow(ceb.bosh).to receive(:upload_cloud_config)
@@ -87,7 +87,7 @@
 
         ceb.run
 
-        expect(ceb.env_creator_adapter).not_to have_received(:deploy_transiant_infra)
+        expect(ceb.env_creator_adapter).not_to have_received(:deploy_transient_infra)
         expect(ceb).to have_received(:write_source_profile)
         expect(ceb.bosh).not_to have_received(:upload_stemcell)
         expect(ceb.bosh).to have_received(:upload_cloud_config)
diff --git a/spec/lib/coa_env_bootstrapper/bucc_spec.rb b/spec/lib/coa_env_bootstrapper/bucc_spec.rb
index 0c48db053..aebfb3304 100644
--- a/spec/lib/coa_env_bootstrapper/bucc_spec.rb
+++ b/spec/lib/coa_env_bootstrapper/bucc_spec.rb
@@ -4,7 +4,7 @@
 describe CoaEnvBootstrapper::Bucc do
   describe '.new'
 
-  describe '#deploy_transiant_infra' do
+  describe '#deploy_transient_infra' do
     context "with no given bucc config" do
       let(:bucc) { described_class.new({}) }
 
@@ -20,7 +20,7 @@
       it "runs a bucc command with the config" do
         allow(bucc).to receive(:run_cmd)
 
-        bucc.deploy_transiant_infra
+        bucc.deploy_transient_infra
 
         expect(bucc).to have_received(:run_cmd).
           with("/path/to/bucc/bin/bucc up --cpi virtualbox --verbose --lite --debug")
diff --git a/spec/lib/fixtures/coa_env_bootstrapper/inactive_steps.yml b/spec/lib/fixtures/coa_env_bootstrapper/inactive_steps.yml
index d1a49d8a2..365143a73 100644
--- a/spec/lib/fixtures/coa_env_bootstrapper/inactive_steps.yml
+++ b/spec/lib/fixtures/coa_env_bootstrapper/inactive_steps.yml
@@ -1,4 +1,4 @@
 inactive_steps:
-- "deploy_transiant_infra"
+- "deploy_transient_infra"
 - "upload_stemcell"
 - "deploy_git_server"