(english) Here are my notes of Taiichi Ohno’s book, one of the founders of the lean philosophy.
Lean is « produce what you need, only as much as you need, when you need »
Even the wise is not right 100% of the time.
And when you know you’re wrong, you should mend your ways and correct yourself. Revise the morning’s orders in the afternoon. Having a sense of humility is one of the conditions for developing strong powers of persuasion.
If you are wrong, admet it.
Go and and see by yourself if it’s true. If not, just say « I was wrong ». People will follow you. We are only right half of the time.
Miconceptions reduce efficiency.
Do one piece at a time. People think that efficiency productivity are improved by producing the same thing over and over.
Confirm failures with your own eyes. If there are two opinions, just try them.
Don’t fear opportunity losses. We can’t see the future, we can forecast the weather but there’s still a lot of mistakes.
Reduced inventory, increased work in process. You can buy up the material while it’s cheap. This is business. But we don’t make what we don’t need.
Mass production is not necessary cheaper.
Agricultural people like inventory.
We tend to keep a lot of things. as if we were still farmers. Because of the weather, the work can be not productive. So we still think « let’s all work hard today and make as much as we can, because you never know ».
Do Kaizen when times are good.
When everything goes well, when the economy is profitable, that’s the time for cost reduction.
Just in Time.
It means more than « exactly on time ». It means also « the good time, not too early and not too late, not necessary on time »
Ohno’s principles aof learning
1. Learn at the Gemba
2. The teacher must say ahead of the student in learning
3. Be a tough coach with high standards
4. Love your students
5. Be passionate, even obsessed with kaizen
« The gemba and the gembutsu have the information. We must listen to them »
« Just in Time means that customer delight is directly transmitted to those who are making the product »
« Knowledge is something you buy with the money. Wisdom is something you acquire by doing it. »
« Don’t look with your eyes, look with your feet. Don’t think with your head, think with your hands. »
« If you cannot follow the rules, you should think there is something wrong with the rules »
« The standard time should be the shortest »
« Don’t seek to follow in the footsteps of the old masters, seek instead what these masters sought » – Matsu Basho