If the change is not made the ones for it will feel hurt. A number of reasons can be given for making a change. Some of these will be more important in one situation than others. The leader needs to be sure that one or more reasons for change is present if he intends to bring about a change. New discoveries make change more economical than to stay with the status quo.
New breakthroughs allow for more efficient ways of doing things.
Radio has gone from crystals, to tubes, to transistors, to solid state, and each has been better. Research indicates that one way of doing something is better than another way of doing the same thing. These might be called modernization changes. Doing the same thing in the same way for years and years becomes less attractive and loses its punch. This is especially true in advertising, and new advertisements are constantly being developed.