It isn't the changes that do you in, it's the transitions. Change is not the same as transition. Change is situational: the new site, the new boss, the new team roles, the new policy. Transition is the psychological process people go through to come to terms with the new situation. Change is external, transition is internal
Managing Transitions: Making the Most of Change (ed. Nicholas Brealey Publishing, 2011) - ISBN: 9781857884258