diff --git a/.obsidian/workspace.json b/.obsidian/workspace.json
index 3a9a9aa..5cc94d8 100644
--- a/.obsidian/workspace.json
+++ b/.obsidian/workspace.json
@@ -13,7 +13,7 @@
             "state": {
               "type": "markdown",
               "state": {
-                "file": "4a1s/MFES/PL - Aula 5.md",
+                "file": "4a1s/RAS/Solution architecture.md",
                 "mode": "source",
                 "source": false
               }
@@ -85,7 +85,7 @@
             "state": {
               "type": "backlink",
               "state": {
-                "file": "4a1s/MFES/PL - Aula 5.md",
+                "file": "4a1s/RAS/Solution architecture.md",
                 "collapseAll": false,
                 "extraContext": false,
                 "sortOrder": "alphabetical",
@@ -102,7 +102,7 @@
             "state": {
               "type": "outgoing-link",
               "state": {
-                "file": "4a1s/MFES/PL - Aula 5.md",
+                "file": "4a1s/RAS/Solution architecture.md",
                 "linksCollapsed": false,
                 "unlinkedCollapsed": true
               }
@@ -125,7 +125,7 @@
             "state": {
               "type": "outline",
               "state": {
-                "file": "4a1s/MFES/PL - Aula 5.md"
+                "file": "4a1s/RAS/Solution architecture.md"
               }
             }
           },
@@ -160,6 +160,8 @@
   },
   "active": "9853b375f7893cb9",
   "lastOpenFiles": [
+    "4a1s/MFES/PL - Aula 5.md",
+    "4a1s/RAS/Solution architecture.md",
     "4a1s/MFES/PL - Aula 7.md",
     "4a1s/MFES/PL - Aula 6.md",
     "4a1s/DAA/PL - Aula 1.md",
@@ -167,7 +169,6 @@
     "Excalidraw/doodles.excalidraw.md",
     "My Digital Garden.md",
     "4a1s/MFES/T - Aula 2.md",
-    "4a1s/MFES/PL - Aula 5.md",
     "4a1s/MFES/PL - Aula 2.md",
     "4a1s/CP/PL - Aula 7.md",
     "4a1s/CP/PL - Aula 6.md",
@@ -194,7 +195,6 @@
     "4a1s/RAS/T - Aula 2.md",
     "4a1s/RAS/PL - Aula 3.md",
     "4a1s/RAS/PL - Aula 2.md",
-    "4a1s/ASCN/T - Aula 3.md",
     "Images/Pasted image 20231004115725.png",
     "Images",
     "4a1s/ESR",
diff --git a/4a1s/RAS/Solution architecture.md b/4a1s/RAS/Solution architecture.md
new file mode 100644
index 0000000..11c243d
--- /dev/null
+++ b/4a1s/RAS/Solution architecture.md	
@@ -0,0 +1,13 @@
+Steps:
+1. Analyze non functional requirements and identify the most relevant
+2. Based on relevance create a priorized list of non functional requirements
+3. Analyze architectural patterns and their characteristics
+4. Identify the best suitable patterns by mapping patterns characteristics to be priorized non-functional requirements
+
+Inputs:
+1. Non functional requirements
+2. Use cases
+
+Outputs:
+1. Decision on the architectural pattern to use
+2. Design 
\ No newline at end of file