The Needs of the Many
http://www.geoff-hart.com/resources/2000/many.htm

Hart, Geoffrey J.S.
Geoff-Hart.com
2000

Abstract:

Installing major software patches or upgrades ranks right up there with paying your taxes in terms of stress. Why the stress? Well, first, there's the instinctive fear of screwing up something that's already working reasonably well, thank you very much, and spending the next 60-hour week trying to get back to where you were before you 'improved' things.