When looking to make a change, reorganize a unit, or develop a new system, people often seek solutions that will last as long as possible. they want them to be be sustainable. But nothing lasts forever. Finding a permanent solution may be infeasible and even foolhardy. Next time you need to make a big change, come up with a temporary solution - not a final one. Most approaches are useful for a certain length of time. When that time's over, you need a new way to attack the problem, which is likely to morph.