Order of Execution in Salesforce

Order of execution in salesforce is like an ABC in Salesforce World, make sure you should understand:-

1. System Validation rule(required field, field format).
2. Before Trigger are executed.
3. Custom Validation rules are checked.
4. After Triggers are executed.
5. Assignment Rules are executed.
6. Auto-Response rules are executed.
7. Workflow Rules are executed.
8. Before and After Trigger are executed one or more time if the workflow rule updates a field.
9. Escalations Rules are executed.
10. Parent Rollup Summary  Formula or Cross Object Formula fields are updated in the respective objects.
11. Criteria based Sharing rules are evaluated.
12. Any Post-Commit Logic is executed.