diff --git a/EA/grail.md b/EA/grail.md
index 0fe6d8ab..54a8999e 100644
--- a/EA/grail.md
+++ b/EA/grail.md
@@ -136,3 +136,6 @@ https://github.com/bpmbpm/doc/blob/main/BPM/theory/company-wide-process.md
     
 #### example of architecture
 ![ris1](pic/arc_2.jpg)
+
+### also
+- https://github.com/bpmbpm/doc/blob/main/BPM/technology/model-first/readme.md