Difference between Event Receiver and Workflows

Event Receivers
• It enables solution architecture designer ,admin Need to improve business process
  
• Sync and asyn process
  
• Can execute either before or after the operation
  
• Can cancel the operation
  
• Cannot be launched manually by the user Can be started manually by the user
  
• Not designed for user interaction
  
• Must be created in Visual Studio
  
• Can execute in response to many different actions, including deletes
  

Workflows

• Always executes after the operation
  
• Cannot cancel the operation as the item will have already been created
  
• Specifically designed for user interaction
  
• Can only execute in response to one of four events – Manual, an item being created,
  an item being edited, and an item being submitted for approval
  
• Can be created with Visual Studio, Visio or SharePoint Designer
  
• Always asyn process