Fixes #6375

docs/internals/pull-request-qa.md

@@ -0,0 +1,11 @@
+Pull request quality assurance
+==============================
+
+When checking if PR could be merged or not the following criteria should be considered among others:
+
+- There should be either an issue linked to PR or PR should have a good description on what is it fixing or adding.
+- Unit tests. Not mandatory but very appreciated. These should fail without the code that the PR is fixing. 
+- CHANGELOG entry should present. It should be put into next release section, ordered by issue type and number.
+Nicknames of people responsible should present.
+- [Code style](core-code-style.md) and [views code style](view-code-style.md) should be OK. These could be fixed while
+  merging if the person merging prefers it that way.