The road to invention Big companies have a big problem with innovation. This was most vividly described byClaytonChristensen, a HarvardBusiness School professor, in his book, "The Innovator’’sDilemma" (HarvardBusiness School Press, 1997). Few conversations about innovation take place without reference to this influential work.The OxfordEnglishDictionary defines innovation as "making changes to something established". Invention, by contrast, is the act of "coming upon or finding: discovery". Whereas inventors stumble across or make new things, "innovators try to change the status quo," saysBhaskarChakravorti of the Monitor Group, another consulting firm, "which is why markets resist them. " Innovations frequently disrupt the way that companies do things (and may have been doing them for years).It is not just markets that resist innovation. Michael Hammer, co-author of another important business book ("Re-engineering theCorporation", HarperCollins) quotes the example of a PC-maker that set out to imitateDell’’s famous "Build-to-Order" system of computer assembly. The company found that its attempts were frustrated not just by its head of manufacturing, who feared it would lead to most of his demesne, including his job, being outsourced, but also by the head of marketing, who did not want to upset his existing retail outlets. So the innovative proposal got nowhere.Dell continued to dominate the business.Mr.Christensen described how "disruptive innovation" — simpler, cheaper and more convenient products that seriously upset the status quo — can herald the rapid downfall of well-established and successful businesses. This, he argues, is because most organizations are designed to grow through "sustaining innovations"-the sort, like Gillette’’s vibrating razor, that do no more than improve on existing products for existing markets.When they are hit by a disruptive innovation — as IBM was by the invention of the personal computer and as numerous national airlines have been by low-cost carriers — they are in danger of being blasted out of their market. This message found a ready audience, coming as it did just as giant businesses from banking to retailing, and from insurance to auction houses, were being told that some as-yet-unformed dotcom was about to knock them off their pedestal.