Too many cooks spoil the broth
Minimize the number of departments, groups and persons involved in a business process
Reijers, H., & Liman Mansar, S. (2005). Best practices in business process redesign: an overview and qualitative evaluation of successful redesign heuristics. Omega, 33(4)
Employing this approach should mitigate coordination issues. Time saved on coordination can be allocated to case processing. Decreasing department count could reduce shared responsibilities, akin to the split responsibilities approach. Yet, it might hinder expertise development (quality concern) and routine efficiency (cost concern).
Foundational free Patterns
Reduce the number of contacts with customers and third parties
Delegate and optimize your operations
Consider whether activities may be executed in parallel
Consider the division of a general activity into two or more alternative activities
Replace underlying resources with eco-friendly alternatives
First-contact problem resolution
Establish a one-contact resolution for customer issues
Expertise-based task assignment
Match tasks to experts' specialized skills for efficiency
Preference-based task assignment
Let people do what they love to do
Distribute tasks by interdepartmental interactions to enable or restrict involvement
Reduce the number of contacts with customers and third parties
If capacity is insufficient, consider increasing the available number of resources