跨組織系統(IOS)是一種由兩間或多間企業所共同使用的自動化資訊系統。有越來越多的企業利用跨組織系統來推動企業間的合作互動，因此，如何衡量跨組織系統所產出的績效便是相當重要的課題。本研究主要是提供一個量化的方式來衡量跨組織系統，不單只著重衡量企業內部，同時也將外部的供應商部份納入考量。最後，本研究以一間台灣的PC製造商作為分析個案，針對此個案做事後分析，印證本研究所提出的量化架構。 / IOS (Inter-Organizational Systems) is defined as automated information systems shared by two or more companies. While more and more enterprises use IOS to promote the collaboration between companies, what kinds of values are derived from IOS and how to evaluate these IOS become important to enterprises. This research aims to provide a quantitative approach to measure IOS values, not only considering the benefits within internal enterprise, but also paying attention to those from external processes with suppliers. We try to propose a new evaluated model. In order to justify our framework, we take one Taiwanese PC manufacturer as a case and do the post-hoc analysis. Through the case study, we prove that our model is validated. We propose new four perspectives in our IOS quantitative framework: IT infrastructure perspective, internal business process perspective, business supplier perspective and business performance. Afterwards, we try to determine the processes in each perspective according to perspectives and then find the quantitative indicators to support our measurement. Lastly, we can even calculate the return on investment (ROI) and break-even point that make enterprises can know the IOS operation more clearly. Therefore, the contribution of this research can be two-folded: first, enterprises can build an IOS quantitative framework to evaluate both intra-firm and inter-firm IOS values quantitatively. Second, enterprises can exactly know how the IOS work, inclusive of detailed processes and interactions with suppliers and how many investment and rewards that enterprises really get.