CAJ | 학술논문

软件即服务（ SaaS）是应用创新引发的软件交付模式创新，对客户而言，也是软件外包服务的创新。它以交付产品差异，定价差异以及交付方式的差异区别于传统的软件外包模式。此文应用博弈论方法，依据SaaS模式的特点，构建SaaS服务提供商与客户的博弈关系，研究双方市场交易权力悬殊与交易权力相当的情景下，SaaS服务提供商与客户的决策行为及其对整体期望利润的影响。研究发现SaaS服务提供商与客户的交易权力悬殊并不影响最优服务质量，而双方交易权力相当则会改变最优服务质量的影响因素；客户交易权力较强时可以增加社会福利；当需求量影响顾客的感知价值时，SaaS客户的剩余价值会增加，而且在特定条件下， SaaS服务提供商的利润也会增加；SaaS服务所需的硬件通过IaaS模式采购会降低SaaS服务的价格，提升SaaS服务的需求量，同时还可以保证服务质量。研究丰富了软件服务外包的理论模型，研究结论对于正在迅速发展的软件即服务乃至云计算服务提供商具有一定的决策支持作用。
연건즉복무（ SaaS）시응용창신인발적연건교부모식창신，대객호이언，야시연건외포복무적창신。타이교부산품차이，정개차이이급교부방식적차이구별우전통적연건외포모식。차문응용박혁론방법，의거SaaS모식적특점，구건SaaS복무제공상여객호적박혁관계，연구쌍방시장교역권력현수여교역권력상당적정경하，SaaS복무제공상여객호적결책행위급기대정체기망리윤적영향。연구발현SaaS복무제공상여객호적교역권력현수병불영향최우복무질량，이쌍방교역권력상당칙회개변최우복무질량적영향인소；객호교역권력교강시가이증가사회복리；당수구량영향고객적감지개치시，SaaS객호적잉여개치회증가，이차재특정조건하， SaaS복무제공상적리윤야회증가；SaaS복무소수적경건통과IaaS모식채구회강저SaaS복무적개격，제승SaaS복무적수구량，동시환가이보증복무질량。연구봉부료연건복무외포적이론모형，연구결론대우정재신속발전적연건즉복무내지운계산복무제공상구유일정적결책지지작용。
Software-as-a-service( SaaS)is the software delivery innovation derived from the IT application in-novation. It is also an innovation of software outsourcing for customers. SaaS is different from traditional soft-ware outsourcing in product form,pricing model,and delivery methods. This paper studies SaaS provider’ and its customer’decision behavior,and its effect on expected profits influenced by their different market powers. It is found that the overmatched market power does not impact the service quality,but the comparable market power will change the service quality effect factors. The surprising findings are that the total expected profit will increase when the SaaS customer own all the market decision right;when the demand quantity im-pact customer’s value,the surplus value,price and service quality will increase,and in certain circum-stance,the total expected profit and SaaS provider’s expected profit will increase at the same time. Hardwares provided from IaaS can decrease the service price and warrant the service quality,furthermore,they will en-large the demand quantity. The research will enrich the theoretical model of software outsourcing,and the con-clusions will contribute to the development of SaaS and Cloud Computing.