[原创]Lean Manufacture and The Market Economy
by Tong Ping<br/><p><strong></strong> </p>
<p><strong>Fellow members</strong>, today let's start from a popular word in p.a.s: lean.<br/><br/>Anyboby heard about lean? Please raise your hand.<br/><br/>Anybody heard about lean manufacture?<br/><br/>精益生产, in Chinese. That's it.<br/><br/>Lean in p.a.s means mainly means<br/>agile software development, as far as I understand. While let's see<br/>what is lean manufacture and what we can learn in addition to this<br/>phrase itself.<br/><br/><br/><strong>What</strong> is lean manufacture?<br/><br/>There are many aspects<br/>of lean manufacture. E.g. with value chain analysis, lean manufacture<br/>can optimize production procedure to reduce waste; with transition from<br/>function-oriented organization structure to project-oriented structure,<br/>lean manufacture can decreases bureacracy and promote communication and<br/>collaboration.<br/><br/>While let's focus on the transformation of the driving mode of the<br/>production flow, from tranditional manufacture to lean manufacture.<br/><br/>See the first picutre. What's the case in traditional manufacture?<br/><img alt="" src="http://filer.blogbus.com/1205299/12052991258377281f.jpg" border="0"/></p>
<p>On the left is the market; on the right is one factory.<br/><br/>There<br/>is a factory planner. All the story starts from the planner's central<br/>estimation of deman, for a comparative long period. And then the<br/>planner gives orders to different steps of the product line. The<br/>successor steps need to wait for the intermediate products from the<br/>predecessors. In the end, the products are pushed to the customer - if<br/>there is demand.<br/><br/>Here is another picture. What happens in lean manufacture?<br/><img alt="" src="http://filer.blogbus.com/1205299/120529912583772851.jpg" border="0"/></p>
<p>All<br/>the things start from the end customer. The customer raises direct<br/>demand. The end step of the product line responds to the demand request<br/>at first. It requests intermediate products from the buffer. The<br/>predecessor step detects the buffer change and supplements the consumed<br/>intermediate products. In this way, the market demand is passed from<br/>the end to the beginning of the product line.<br/><br/>What have been changed? There is no planner, there is no central<br/>estimation, and there is no ordering. The task of the factory<br/>management changes - from the planning and ordering to coordinating and<br/>guiding. <br/><br/>What have we seen?<br/><br/>1st, in traditional manufacture, the production is pushed starting<br/>from the planner; in lean manufacture, the production is pulled<br/>starting from the customer.<br/><br/>2nd, the driving force changes - from the planner's estimation of the demand to the customer's direct demand.<br/><br/><strong>So far</strong>, do you recall some similar things?<br/><br/>Go back to the picture of traditional manufacture.<br/><br/>Imagine, the factory planner as the government.<br/><br/>Imagine, the factory - its departments and production links - as all the producers and dealers in the whole market.<br/><br/>What's that? That's the planning economy!<br/><br/>What's the same<br/>between the planning economy and traditional manufacture? The visible<br/>orders drive the production in both cases, no matter whether the orders<br/>are from the government or from the factory planner.<br/><br/>How about the case in lean manufacture? Have a look at its picture.<br/><br/>Imagine, the factory management as the government, who gives guidance only other than ordering.<br/><br/>Still, imagine, the factory - its departments and production links - as all the producers and dealers in the whole market.<br/><br/>What's that? That's the market economy.<br/><br/>What's the same<br/>between the market economy and lean manufacture? The invisible hand -<br/>market demand - drives and regulates all the production!<br/><br/>Amazing similarity!?<br/><br/><strong><br/>We</strong> talked about traditional manufacture and lean manufacture. We talked about the planning economy and the market economy. <br/><br/>Which is better? Which is worse?<br/><br/>The planning economy, or the market economy? <br/><br/>We even needn't answer this question. Today, it's common knowledge: almost all the markets are practising the market economy.<br/><br/>In fact, it's one principle accepted and applied by people on the <strong>MACRO </strong>level.<br/><br/>On the other hand, there is traditional manufacture in most<br/>factories; there is lean manufacture in more and more leading<br/>enterprises. Aren't they reflecting similar transformation on <strong>MICRO </strong>level as economies?<br/><br/>The difference is: people are still exploring how to use lean well.<br/><br/>Then, keep thinking - you, may find more new things from lean!</p> <p>没太看明白 呵呵</p>
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<p>lean的方式讲求减少WIP，但是你的lean Mfg示意图中各个工作站位都增加了Buffer，这好像违背了lean的初衷吧</p>
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