look for information (include citations of the sources you referenced as part of your submission) and provide a brief description, in your own words, for two "lean" management techniques used by Toyota: Value Stream Mapping and A3 Problem Solving. Be sure to elaborate briefly (about 400 words, maximum limit of 500 words total (excluding citations of references) for both practices combined), and include, in addition to their descriptions, your own understanding of the thinking behind each of these two techniques, and what you believe is good (or not so good) about them