Refer to this 9 principles of process design :

1. Moments of truth
2. Adding value for the customer
3. The reduction of Handoff delays
4. Caution-avoid over automating
5. Business process standardization.
6. Business rules.
7. Compliance
8. Validating the business process design
9. Simplicity in the business process design

Questions:

What are the challenges in improving processes even after identifying the causes of the problems?

How can business overcome those barriers and sustain the improved processes?