Tribal knowledge can be a killer. For a smaller, stable company not on a growth path, it probably isn’t the worst thing ever – unless you lose one of your long-term employees who is the only one that knows how to do a lot of things. Certainly for any company that is on a more dynamic path for growth, adding new customers, more employees, or is concerned about losing that knowledge of a key employee it can be a major problem. Having your companies’ processes and procedures be locked in the brains (and only the brains) of your employees can be very difficult when you lose someone.