What’s Kaizen? 什么是改善?Why it is necessary to us?改善的重要性?How to write Kaizen? 如何寫改善建議?Who will review and approve my Kaizen?誰來審核批準(zhǔn)我的改善建議?Who execute Kaizen?誰來執(zhí)行改善?Normally, how long time to close a Kaizen?一般多長時間關(guān)閉一個改善建議?How many Kaizens I need..