diff --git a/factory-method/README.md b/factory-method/README.md
index 4334b052353d..d45a6aa0cac7 100644
--- a/factory-method/README.md
+++ b/factory-method/README.md
@@ -31,6 +31,9 @@ Real-world example
 In plain words
 
 > It provides a way to delegate the instantiation logic to child classes.
+> 
+> Imagine a messaging app that can send notifications by Email, SMS, or Push Notifications.
+> The user only asks to send a message. The Factory Method chooses and creates the correct notification service 
 
 Wikipedia says
 
diff --git a/singleton/README.md b/singleton/README.md
index 92505061399e..48cbc211aa24 100644
--- a/singleton/README.md
+++ b/singleton/README.md
@@ -37,6 +37,17 @@ Sequence diagram
 
 ![Singleton Pattern sequence diagram](./etc/singleton-sequence-diagram.png)
 
+## Singleton Implementation Comparison (for eager and lazy initialization)
+
+| Feature | Eager Initialization | Thread-Safe Lazy Initialization |
+|----------|----------|----------|
+| Object Creation | During class loading | First call to `getInstance()` |
+| Thread Safe | Yes | Yes |
+| Synchronization Required | No | Yes |
+| Memory Usage | Higher | Lower |
+| Performance | Faster access | Slight synchronization overhead |
+| Complexity | Simple | Moderate |
+
 ## Programmatic Example of Singleton Pattern in Java
 
 Joshua Bloch, Effective Java 2nd Edition p.18