| Summary: | 碩士 === 國立臺灣大學 === 土木工程學研究所 === 94 === Based on the awareded PPIP（Private Participation in Infrastructure Projects）cases until the first season of 2006 from Public Construction Commission, 78 projects（25.08%）were behind schedule and 6 projects（1.93%） were early terminated in 311 projects. In 231 register projects, there were 41 delayed projects（17.75%）and 6 canceled projects（1.93%）as well. The causes, conditions, and processes behind the implementation of these problematic PPIP projects need to be investigated and analyzed.
Lack of in-depth discourse and research on the difficulties in the PPIP, with long contractual period throughout 10 to 50 years, it is critical to provide a long-term response to fulfill the requirement of project management and the expectations of stakeholders and citizens at construction and operation stages.
Accordingly, this research aimed to investigate the potential problems for implementing PPIP projects in current circumstance and to analysze the causes, conditions, and processes. The experience of construction and operation in selected cases from Taiwan have been documented in adequate details, including different types of private participation（BOT, BOO, ROT, and OT）and facilities（transportation, cultural and education, agriculture, water and sewerage, industrial and commercial, medical treatment）.The amount of selected cases range from half of million to 20 billion NT dollars, and the contractual period were scatter from 3 to 60 years.
The methodology of this research was literature study and interview from experts. The Critical Failure Factors (CFF) for the public-private partnerships (PPP), generalized from Taiwanese cases, include:
（1） Deficient approval process;
（2） Delay execution of government’s commitment;
（3） Cognitive difference about regulations;
（4） Difficulty in loan acquisition;
（5） Different interpretation of contractual clauses;
（6） Overoptimistic estimate of operating incomes;
（7） Opposition from the community; and
（8） Delay execution of contract’s implement.
The relationship between these Critical Failure Factors and their causal factors are represented in the form of the systematic diagram. The government will be able to prevent and reduces the potential problems of PPP cases. The private enterprises will be able to evaluate the project viability of PPP over the long-term contractual period.
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