Start with the business. Design the model to follow the logic and structure of the business organization. Understanding its challenges will provide insight into what the model needs to deliver. When the model connects to the business needs,it is more likely to work.
Differentiate between transactional and transformational HR work. A common mistake is to make administrative HR changes without addressing more strategic issues.
Evaluate your HR practices, processes and policies. Choose some real situations, and work out exactly who will do what, where the 'hand-off' points will be and how they will take place, not just for HR, but also for the line.