The consultant may work closely with the client representative to meet all the requirements conveyed to them by the representative, only to find that the client (who is cutting the check) is not satisfied. 

at Goldsmith Hall we had the "Pigeon Wars."  All the buildings on the West Mall were inundated with pigeons and for students that liked to have their windows open they were always having to fend off pigeons on the window sills.  Various spiky objects were tried with varying success.  Occasional haz-mat crews would descend on the building for a general cleanup of pigeon droppings.

I had slacked off my junior and senior year as I was focused on my job and had a severe case of senioritis.  I was still taking challenging courses, but getting "B's" for the most part.  Graduating in the top 10% became seriously in doubt.