Abstract The sewage sewerage system is an important public infrastructure actively pushed by the government presently, since it can improve our environmental quality and promote the nation¡¦s competitiveness. To minimize the government's short-term financial burden and attract the private capital, vigor, and efficient management, the Executive Yuan encourages the private sector to participate the sewage sewer construction plans via the BOT (Build-Operate-Transfer) model for those systems above 10,000 tons capability per day. It is estimated there are totally over 36 such systems in the country. This research consists of two parts. The first part deals with the feasibility study of the BOT model for the sewage sewer in Taitung city. Three factors, including the law, the risk, and the financing were assessed. In the aspect of the law, the completeness of related regulations, the timetable of local government¡¦s plan, the sewage sewer¡¦s fee, and others were important items for the success of the task. In the aspect of the risk, the allocation of risks in the various stages is the important item. Finally, the financial feasibility studies were conducted for the Nantz and Danshuei demonstrated cases, in which the government expenditure and the operation net income of the private part are the important items. Presently, the relevant BOT case documents and materials show that the financial structure is one of the key assessment elements provided that the promotion of the trade and investment, and the sign of contract are successful. So the second part of this research involved the questionnaire survey as to analyze the key factors that are beneficial for the success of the promotions of trade and investment, and the sign of contract. Results show that the successful factors include the favorable financial guarantees, the lowest guaranteed operation amount of sludge, and the take-hold of the construction land by the government. All these factors should be carefully assessed and planned in advance, together with the well-designed coordination mechanism for the agreement/contract. Keywords: Sewage sewer system, privatization, BOT model

As more and more cooperation between government and private sector in public projects, the government is making a further promotion of private participation in public parking lot construction to improve the problem of parking supply exists in our city. This task needs strict project delivery procedure, objective and professional pre-work, but most cases in Taiwan, financial feasibility is private investor¡¦s greatest doubt because of lacking related analysis precisely. That is why there are very few parking lots invested and built by non-government sector. After integrating the ways and processes of private participation in public construction, this study will review the executive deficiency and propose improvement strategy from Taipei¡¦s experience in promotion of parking lot built by private sector. In addition, a currently running parking lot will be involved in case study to illustrate the financial feasibility of BOT. From the result of analysis, it is infeasible through BOT to construct parking lot. It must increase the rate and take some useful measures to make BOT feasible. If it is impossible to raise the parking fee, in order to get the problem resolved, the parking lot should be constructed by government and operated by private sector.