diff --git a/.gitignore b/.gitignore
index e85e8bf..a50286e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 **/*.drawio.bkp
 .talismanrc
+resources/.DS_Store
diff --git a/resources/diagrams/traceability-concept.drawio b/resources/diagrams/traceability-concept.drawio
index eab4a34..7de29fa 100644
--- a/resources/diagrams/traceability-concept.drawio
+++ b/resources/diagrams/traceability-concept.drawio
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@@ -94,12 +171,12 @@
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diff --git a/resources/diagrams/traceability-concept.png b/resources/diagrams/traceability-concept.png
index 3faf021..ae1b6ab 100644
Binary files a/resources/diagrams/traceability-concept.png and b/resources/diagrams/traceability-concept.png differ
diff --git a/traceability-concept.md b/traceability-concept.md
index 2a52a59..7099f70 100644
--- a/traceability-concept.md
+++ b/traceability-concept.md
@@ -2,4 +2,8 @@
 
 ![Traceability Concept](resources/diagrams/traceability-concept.png)
 
-To be discussed with ZUCL1.
+Regulations are mapped as requirements work item in Azure DevOps that affect other requirements. In that way we see all regulations that affect a requirement and all requirements that are affected by a regulation. This is a bidirectional traceability.
+
+All requirements are listed in a use case specific document. The requirements are linked to the regulations and the tests. The tests are linked to the requirements. This is a bidirectional traceability.
+
+This results in a traceability matrix that documents the requirements from the regulation to testing.