中小企業一向是我國經濟主力，然其資訊化程度未有明顯成長。其中之因，根據 中小企業處的調查，發現因其資訊支出甚少，無法探買運作效率較好但成本較高的客 製化資訊軟體。而我國客製化資訊軟體業為爭取中小企業市場，並迎合當前收費方式 的多樣化，亦推出定期付租的新收費方式。然此與傳統作法不同的收費方式，充滿許 多不可知的問題，如是否可行、推行要素等。而這些問題都必須先建立模型後，方能 實作而逐項釐清。所以，本研究以馬可夫鏈理論模型對定期付租收費方式進行數量面 探討，期有助業者觀念的了解，進而利於中小企業資訊化發展，並促我國客製化資訊 軟體的成長。

The small business industry is the main economic power of our country. But its information development isn^t progressive apparently. Based on the survey of the small business industry ministry, the industry spends little in the information development » so they cannot buy the effectively but costly customized information systems. Since the customized IT software vendors develop new payment method- periodic rental payment for fulfill the need of small business and can meeting the ability of diversified payment. But the new payment method is full of new questions. How to build a feasible model to simulate these questions become important. Therefore, in this study, we provide a model, which is based on Markov theory to develop model for exploring the periodic payment And we expect this study can help both the small business industry and the customized information software industry.