Update README.md

README.md

@@ -178,7 +178,7 @@ Requirements:
 
 ### Design Notes
 
-Before implementing the schema, identify:
+Before implementing the schema, carefully design:
 
 * The primary key of each entity.
 * The foreign key relationships.
@@ -188,6 +188,16 @@ Before implementing the schema, identify:
 
 Your schema should be normalized and designed to avoid unnecessary data duplication.
 
+### Recommendation
+
+Before writing any SQL, create a simple Entity Relationship Diagram (ERD) to visualize:
+
+* Entities
+* Primary Keys
+* Foreign Keys
+* Relationships between tables
+
+This diagram does not need to be submitted, but it is strongly recommended as part of the database design process.
     
 
 ## 💻 Required Features & App Flow
@@ -285,7 +295,7 @@ Your project will be graded based on the following:
 
 **1. Database Design:**
 
-- Correct schema design with appropriately chosen data types.
+- Correct schema design with appropriately chosen data types, keys, constraints, and relationships.
     
 - Proper use of Primary Keys, Foreign Keys, and Constraints (e.g., `NOT NULL`, `UNIQUE`).