Advanced planning is important for the process of change in a business because change can be very difficult and complex. A business that tries to make any kind of major changes in an ad hoc or unplanned way is asking for trouble.
Change in a business can have many consequences. These consequences must be foreseen to the greatest extent possible. If a business does not plan, it will not foresee these consequences and it will not have any predetermined way to deal with them. Its process of change will be haphazard and may cause losses in productivity.
For example, let us say that a business is planning to split off parts of two departments to form a new department. It needs to plan the organizational chart of the new department, of course. However, it also needs to plan for how it will deal with reactions to the change. Managers in the old departments may be upset with losing part of their “turf.” There may be a need for an adjustment period as work has to be done in new ways because of the new structure. If the firm does not plan for these and many other impacts of the change, it will not change as efficiently as it could.