Kaizen can stifle innovation and risk taking

Kaizen's biggest weakness: it improves what exists but creates nothing new. How Sony lost the Walkman to the iPod & how Toyota avoided the same trap.

One of kaizen's greatest weaknesses is that it is fundamentally backward-looking: make what we do better. That's valuable, but it comes with a cost. Kaizen encourages you to play it safe, to keep refining what already exists, and in doing so promotes an inward-looking culture where market opportunities can be missed. The next disruptive technology rarely comes from incremental improvement. It comes from big bets, risk-taking, and creative leaps that may take a company well beyond its original product territory.

Nowadays you bring an iPod, not a Walkman, for music.

Sony is the canonical example of where kaizen failed. The Walkman was a genuinely original invention - a disruptive product that defined a category. What followed was decades of refinement rather than further leaps. The same pattern repeated with the CD player, co-developed with Philips and subsequently polished through continuous improvement.

What Sony failed to see was that by the end of the millennium, the wind was shifting decisively toward digital music and the MP3. When the disruption came, it came from Apple: an unorthodox entrant whose iPod managed to unseat what had seemed like an unsinkable cultural icon.

Sony responded as a kaizen culture would predict: slimmer players, more colour options, better battery life. They even improved their MiniDisc (MD) format to support MP3 transfers (albeit only via proprietary Sony software) and expanded data storage to 1GB on the small discs. It wasn't enough. The iPod redefined the rules of the game entirely. Ease of use, a vast music catalogue via iTunes and the coolness factor that Sony could not manufacture combined to cement Apple's dominance and seal the Walkman's decline. Kaizen could not provide the speed, nor the product, to meet something that disruptive.

There is a lesson in how Toyota approached the Prius. Executives deliberately appointed an engineer from technical research rather than vehicle development, someone untainted by the incremental assumptions of existing car programmes. The Prius needed a fresh perspective, not a refined one. Less kaizen, not more, produced Toyota's most significant product innovation in decades.

While kaizen is, and will remain, an important part of the quality repertoire, kaizen isn't the answer to every problem. Applied without judgement, it can quietly stifle innovation, reinforcing the assumption that the path forward is always an improvement on the path already taken. Sometimes it isn't.

Make kaizen a rule. Don't make it the rule.

Related articles:
An excellent article published by Newsweek in 2007 asking "Why Apple isn't Japanese" provides an excellent analysis of why Sony has fallen so far from its mantle. CNET's article "Sony's fall and Japan's hang-ups" is also an interesting read.