Messages in this thread | | | Subject | Re: ioctls, etc. (was Re: [PATCH 1/4] sas: add flag for locally attached PHYs) | From | Alan Cox <> | Date | Mon, 24 Oct 2005 16:41:35 +0100 |
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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.
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