Working as Designed n.Colloquialism used by software
maintenance people to indicate that while there is a
problem, it is not considered to affect the program
when the program is used for the purpose for which it
was designed. Of course, nobody uses programs the way
that programmers design them. The general user response
is usually some nasty remark about the 'designers'
mental condition when he designed it.
-- IBM Jargon File