As petition growing much more fierce in the global market place and the higher demand on the product quality price and punctuality of delivery from the customer, the traditional production and operation model is lagging far behind to meet them It is always a task for the manager to plish on how to improve the management level consolidate and strengthen pany’petitiveness The background of this paper is the IT manufacturing sector and the study object is the Hard Disk (HD) Branch of Mitsubishi Chemical Infonics ( MCI) It presented and analysis in depth on the current situation of product management quality management and the production flexibility from the aspect anization chart and production and operation management It pointed out the four main problems with the branch willful waste unstable product quality disorderly working place and high employee turn over rate Those problems has affected in the bad way on the employee’s moral working efficiency product cost and quality accident The profit of HD branch was lower year by year and petitiveness was dented The HD branch management took the action by implementing JIT and 5S in the shop floor after realizing the problems The management intends to tackle the problems improve the production and operation management level and improve the branch’petitiveness by introducing the advance production and operation model The paper described in detail on the measures and the methods of how HD branch put forward the JIT and 5S It also pinpointed the deficiencies of the implementation and provided some personal advices As the accession of China into the WTO the IT manufacturer in China will face petition from all over the world The study on production and operations management of HD branch of 庞大的下载资料库 Mitsubishi chemical Infonics (Singapore) might provide a reference on improving of production and operations management level for IT manufa