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Fixing Systems that Ain’t Broken

Fixing Systems that Ain’t Broken. Dr. Roberto Sasso Feb. 7 th 2003. “Wear and tear” of software. “Good” software should work forever Time has a definite effect on software It is not quite like wine In 1971 maintenance was 30% of effort In 2003 maintenance is close to 90%.

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Fixing Systems that Ain’t Broken

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  1. Fixing Systems that Ain’t Broken Dr. Roberto Sasso Feb. 7th 2003

  2. “Wear and tear” of software • “Good” software should work forever • Time has a definite effect on software • It is not quite like wine • In 1971 maintenance was 30% of effort • In 2003 maintenance is close to 90%

  3. The future of software • Is software maintenance the future of programming? • Will we keep writing the same applications over and over again? • Will the software world become saturated? • Should we advise our children to study law?

  4. When should software be fixed? • When all hell breaks loose? • When it stops working? • When the first bug is found? • When user demands overwhelm maintenance personnel?

  5. Analogies are missleading Things made of atoms are inherently different!

  6. Software fixing software • Since the world insists in changing at an ever increasing pace, software must be flexible • Software transformation seems to be the key • Not magic • Not rocket science • Artificial Intelligence (better than Natural Stupidity)

  7. Software “use by” date • We need to know well in advance when the software will stop being useful • IF we could measure software flexibility or mantainability... • THEN its a piece of cake • ELSE we must use financials to estimate the use by date

  8. When should software not be fixed? • When its opaque and obscure (and ugly!) • When it performs its funcionality wrong • When it crashes only when its running • When the business changes 180 degrees • When its broken!

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