When traditional enterprise software vendors adapt to software as a service (SaaS) practices and evolving to cloud service models, there is a major change occurring in the enterprise: a new hybrid product strategy consists of on-premises software and competitive customized SaaS. For the first time, we build a stylized model to reveal the influence of SaaS customization on the decisions of monopoly software vendor in the transition period. Increasing the customization efficiency of SaaS results in two possible structural regimes in the market. One is single on-premises software dominate the market if SaaS is customized at a low level and the other is hybrid products segment the market if SaaS is moderate-level customized. Surprisingly, software vendors with high customization proficiency should not allow SaaS products to dominate the market. It would benefit more from offering a competitive hybrid product strategy. Therefore, this paper does not recommend traditional software vendors to transform into pure cloud service providers. This key findings remain valid in the extended analysis of other customization technologies. Besides, the extension models show that both configuration and personalization customization technologies outperform the modification customization technology.

当传统的企业软件供应商适应软件即服务（SaaS）的做法并发展到云服务模型时，企业中将发生重大变化：新的混合产品策略包括本地软件和竞争性定制SaaS。我们首次建立了一个程式化模型，以揭示过渡时期SaaS定制对垄断软件供应商决策的影响。提高SaaS的定制效率会导致市场出现两种可能的结构体系。如果SaaS是低级别定制的，则一种是单一的本地软件在市场上占主导地位，而如果SaaS是中等级别的定制，则另一种是混合产品细分市场。出乎意料的是，具有高度定制能力的软件供应商不应允许SaaS产品主导市场。提供竞争性的混合产品策略将使它受益更多。因此，本文不建议传统软件供应商转型为纯云服务提供商。该主要发现在其他定制技术的扩展分析中仍然有效。此外，扩展模型表明配置和个性化定制技术均优于修改定制技术。