1. Operational know-how lost
2. Wisdom lost - the understanding of how you like things done at your company
3. The time wasted and the damage control required from the remaining employees
4. The moral impact if the person who left was very likable
5. The risk of losing existing customers or clients
6. The time required to bring another employee to the same level of competency
7. Potential loss of immediate and long term client relationships (repeat business & referrals)
8. Time drain on supervisors and leadership to retrain and build a new employee relationship
9. Revenue loss based on role level and impact
