Introduction: at different levels of granularity, produced extensive and lean two kinds of thinking. Extensive and lean are two different ways to solve the problem of different stages of development, suitable for. development process is continuously enlarged scale, but the size shrinking process. The development of the scale of development will be faster than the size of excessive optimization, resulting in excessive management; scale development faster than size development will be overly optimistic, out of control. scale enlarged size shrink total economic development is more and more big, the industry increasingly fine division of labor, make it rigidly uniform thinking more effective from the previous slowly become don’t work, the control granularity requirements thinner, smaller, more detailed rules need to clear the standard of behavior, clear boundary, management risk. lot of problems seem very fierce quarrel, a large difference, often because the granularity subdivision of the problem is not enough, together when it is difficult to say clearly, each around two aspects of a problem statement. A lot of the time because the total development has become larger, each aspect all has become larger, complex, not the two aspects together to make the rules, need to be separated to discuss, when grain size reduced to a finer granularity, found that there is no essential differences. The particle size reduced, discuss the scheme for a more specific situation, will release a large amount of bonus, the problem more easily see. The macro, the problem size reduction is needed to carrying through the carrier of law, a clear conclusion specific programs, in each specific case; the micro, the problem size reduction is needed to carrying through the carrier flow and standard, clear rules. The economy develops to a certain stage after the clear description of small particle size rules need to be resolved through legal framework more system, the rule of law is the economy is bound to a certain level of. at different levels of granularity, produced extensive and lean two kinds of thinking. Extensive and lean are two different ways to solve the problem of different stages of development, suitable for. extensive and lean Methods: the granularity of lean management, no black box, from the maximum size, to the smallest size, the ratio of input and output to reach the optimum. The basic requirement is high, the work in accordance with the established method is summed up, appropriate incentives, can produce good results; through continuous improvement of methods, to ensure the implementation, enhance the execution results. Rights and responsibilities clear, correspondence, strict reward and punishment. Methods: extensive large granularity management, black box, the granularity of input and output is not clear. The basic requirements of simple, high bonus incentive execution, execution expert methods, learn from each other to improve; through bonus ratio and increased bonus items, as well as change bonus target to enhance the execution result. Profit mix, reward and punishment from the same big pot. not only reflects the extensive coarse grain in a moment of, but also the performance of changeable, love in the time in the process of development. The key