An organization has excellent facilities, technology, best-practice knowledge, and a passionate workforce — yet is not achieving organizational goals. And yes, senior leadership is solid. So what is the issue? In cases like this, I find that a good place to look is experience.
What percentage of new people can a department or organization have until it impacts performance? There’s no single answer; it’s relevant to the department, the role, and the new person who fills it. It’s also important to factor in whether employees are experienced in the role yet new to the organization or new in both role and experience.