在過去PC產業中，記憶體模組算是很特殊的一個產業，由於記憶體模組製造不像上游DRAM的製造廠商因為需要相當大量的資金投入與高度的半導體應用技術，因此造成了該產業的進入障礙與退出障礙都非常高。然而記憶體模組的生產製造卻因為對資金與技術的需求低，而且時常受到DRAM價格波動影響。因此一直以來；記憶體模組廠商的經營好壞都被帶抹上一層投機的色彩來看待。
近幾年來；因為快閃記憶體(Nand Flash)的應用市場快速的成長，給了記憶體模組生產製造的廠商一個可以在相近的供應鏈環境下進行多角化的機會。也讓記憶體模組廠商有絕佳的機會去推廣自有的品牌。但是快閃記憶體的應用都是消費性產品的市場，在市場上所面的競爭者除了同是記憶體模組廠同業的競爭者外，還多了許多原本就雄據於消費性電子產品的大廠，像是Sony,Apple..etc。
在如此的環境下，記憶體模組廠商該如何在市場上尋找到正確的市場定位與擬定出公司的競爭策略，讓公司能持續的成長與保持獲利。本研究主要是希望藉由管理策略大師麥克•波特Michael E. Porter (1985)競爭策略一書中所提的對產業市場的分析與五力分析的方法，能夠了解記憶體模組廠商在市場上的關鍵成功因素(KSF)以及策略群組的狀態。最後對整個研究做出結論與建議，以提供相關業者與未來進行個案研究時的參考。

In the PC industries, Memory module house is very particular industries. DRAM is the key component of memory module. There are very highest boundary for entry or off DRAM industry because DRAM manufacturing needs higher capital and high-end semiconductor technology.but it is very easy skill to build the memory module and doesn’t need too much capital to support the business. Besides DRAM price is very intense uptrend or downtrend. So people think the memory module house is belong to the adventure business in the PC industries.
In recent, the application market of Nand flash chip is growing very fast.
It is very similar supply chain with DRAM chip for memory module house. And it also a very good opportunity to promote ower brand of the memory module house to market and face the consumer directly. But they will meet new competitor such as Sony, Apple..etc in the consumer market.
Sony and Apple is the leader and very big company in the consumer market. In the industrial environment; it is very important how to find the right competitive strategy position in the market and plan the competitive strategy of the company. It will let the company to keep in growing and profiting.
This research is mainly to hope following the method “Five Forces” in Competitive Strategy-Techiniques for Analyzing Industries competitors book authored by Michael E. Porter (1980), to be a basic discussion background of this research. To understand the KSF and strategic group map in the market of memory module house . And then make a conclusion and suggestion for whole research, to provide the case study and reference to a proprietor and research in the future.

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三、 網址部份
1.DRAMeXchange，www.dramexchange.com
2.電子時報，www.digitimes.com.tw
3.Dataquest，www.dataquest.com
4.Kingston，www.kingston.com
5.Microsoft，www.microsoft.com