Another thing I forgot is actually its twice the work for management if you outsource and have very tight supply lines you have to continually be in contact with suppliers and even there subsuppliers to ensure smooth production. Little nugget from my own experience is when there was a fire in one of the INTEL fabs it affected Motorolla badly cos there supply lines were very tight and they lost serious market share. There competitors bought all the chips availabe because they did not just rely on the say so of INTEL that production would be back ontrack soon and of course Motorolla had no way to make there own chips.