Never unmock (take down or destroy) working installations.
A working installation is something that is operational.
The most flagrant violation of this is tearing up Div A to create Div B.
Division A is working. Somebody orders Division B to be strengthened.
A stupid or suppressive personnel person will tear up Div A to get personnel for Div B.
The correct action is to find extra or new people for the new action.
MUSICAL CHAIRS (transfers of persons around an org) is THE SINGLE MOST DESTRUCTIVE ACTION TO AN ORG'S STATS.
A failure to recruit and train new people leads one toward the destruction of working installations.
Whenever a new unit has to be made up, the failure to recruit and train shows up vividly. Essential people are ripped off their posts to form the new unit and the destruction of working installations by this action shows up at once in production stats.
It takes a great deal of work to find, hat and post people and get them experienced enough to produce. It takes a lot of work to make a working installation. But in one swoop some irresponsible personnel transfer can destroy it.
In mechanical matters the same thing applies. It takes a lot of work to make something operational. If for a while it is not used, a mechanic may rob its parts to set up something else instead of getting new parts for the something else. Then when the working installation is needed, it doesn't function and a great deal of trouble and expense is put in setting it up again. The trouble and expense is far more costly than getting the parts elsewhere.
NEVER UNMOCK A WORKING INSTALLATION.
It will be far more costly than going to a lot of trouble and expense to get the people or parts elsewhere.