diff --git a/guidelines/decision-process.md b/guidelines/decision-process.md
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@@ -1 +1,21 @@
+# Decision making process
 
+
+## Definitions
+1. *Consensus* is defined as lack of sustained opposition.
+2. *Good standing* is a characteristic of group members who fullfill their implicit and explicit obligations and hence are allowed to excercise all of their rights within the group without restriction.
+3. *Blacklist* (*blacklisted*, *blacklisting*) is a taxative enumeration of group members who are temporarily excluded from exercising their rights within the group.
+4. *Normative keywords* as defined in [BCP 14](https://tools.ietf.org/html/bcp14)
+
+## Rules
+1. Any current group member is deemed to be in good standing unless blacklisted.
+2. Any group member in good standing MAY make a proposal to the group via
+    - raising an issue,
+    - PR (against the repo or wiki), or
+    - orally in a monthly group meeting.
+3. Approval or rejection of proposed solutions and decisions SHOULD be driven by consensus.
+4. Consensus MAY be reached as part of the PR or issue resolution process.
+5. The monthly group meeting has the ultimate decision making authority.
+    - Chair Group or Chair don't have a decision making authority, see [chair-group.md](chair-group.md) and [chair-group-members.md](chair-group-members.md).
+6. In case consensus cannot be found over multiple iterations of arguments and counter arguments, a monthly group meeting MAY reach consensus to mandate the Chair Group to organize a ballot among all group members in good standing. The ballot wording, options, and success criteria SHOULD be explicitely defined in a monthly meeting. The Chair Group only administers and implements the ballot and its results.
+7. Blacklisting procedure is TBD by monthly meeting consensus if and when needed.