On 10/24/05 11:41, Alan Cox wrote: > On Llu, 2005-10-24 at 09:51 -0400, Luben Tuikov wrote: > >>controls and how. Understanding how the factory workers use it and what >>they expect. Understanding the code (which may not be as easy). Then it >>is rewritten so that it can be easily supported and maintained. > > > Very very rarely, because it means down time and supporting two systems > at once. Take a look at the australian customs fiasco or the british > passport office disaster to see why (actually almost any large > government IT project where politics dictated 'write new stuff so I can > announce it in parliament'). > > The smart factory update would occur piece by piece. Starting with the > most pressing problems (ie fastest ROI) and working to a plan that ends > up with the system modular and clean. > > You don't turn a steel plant off for a software upgrade. There was 0 (zero) effective downtime to the factory. Luben -- http://linux.adaptec.com/sas/ http://www.adaptec.com/sas/ - : send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
