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90 to 10 or 80 to 20 rule

"The first 90% of a software project takes the first 90% of the time, and the final 10% takes the second 90%" - Anon, but I'm sure someone can attribute it.

I scanned the flyleaf of a book at Heathrow a couple of weeks ago, and it was talking about an 80 / 20 rule, where 80% of effort goes on 20% of effect, and therefore 20% of effort generates 80% of effect. The moral seems to be to try to identify the effective 20% of effort and grow it, weeding out the less effective 80%. Certainly, I find myself too busy to take on all the projects and opportunities I would like and I'm looking to make more and more tuned and effective use of my time, not being frightened to say "no - that's not up my line".

Having read the flyleaf, I returned the book to the shelf. As I was understanding the introduction, I had gained 80% of the goodness in 20% of the time that a more thorough scan would require.
(written 2004-08-15, updated 2011-12-31)

 
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G502 - Well House Consultants - Business Practice
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This is a page archived from The Horse's Mouth at http://www.wellho.net/horse/ - the diary and writings of Graham Ellis. Every attempt was made to provide current information at the time the page was written, but things do move forward in our business - new software releases, price changes, new techniques. Please check back via our main site for current courses, prices, versions, etc - any mention of a price in "The Horse's Mouth" cannot be taken as an offer to supply at that price.

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