In a continually
changing external environment plans are very crucial and must be able to change
if necessary.  The managers must observe environmental
changes that could impact the effectiveness of the plan. If there are any
changes they should make adjustments to their plan to stay in the right
direction. It is also important to do formal planning even when the environment
is unstable to keep a good organizational performance. Another good practice is
that they should train employees to set their own goals and plans to work more effectively.