
Welcome to the cove qihonghai
Wmarhel & Harry have given you the right advise, to contact TOYOTA. They treat their suppliers as 'partners' and teach them all the tricks in the trade.
Additionally I suggest you go through two books
"THE TOYOTA WAY" &
"THE TOYOTA WAY FIELD BOOK" by Jeffery K Liker, published by Tata McGraw-Hill. They contain 14 Management Principles and 4 Ps of "TOYOTA PRODUCTION SYSTEM" popularly known as
'TPS' in short. It describes how TPS evolved as a new pradigm of manufacturing.
By going through these books you will be able to understand their philosophy and methods. In brief, the 14 Principles are foundation of TPS, sub-devided into four categories, all starting with 'P' for Phlosophy, Process, People/Partners and Problem-solving.
By using TPS, Toyota has turned 'operational excellence' into a strategic weapon, which is based in part on quality tools viz: Kaizen, JIT, One-piece flow, Heijunka and Jidoka. These techniques formed the basics of 'Lean manufacturing' revolution.
In the words of
Taiichi Ohno, the founder of TPS:
"All we are doing is looking at the timeline from the moment the customer gives us an order to the point when we collect the cash. And we are reducing that timeline by removing the non-value-added waste".
I am not as lucky as
you are to be a direct supplier of TOYOTA, but I have learnt the 'TOYOTA PRODUCTION SYSTEM' mainly from these books and am trying to apply them in parts at my factory. Though far-far removed from the ideal, I have gained a lot in improved quality & production.
Hope this helps and wish you all the best. Do come back to share your experience and/or for any more questions on TPS.

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Umang