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In order to select a preferred alternative for an inspection and control of mobile air pollution sources(motorcycles)program, the analytic hierarchy process(AHP) was adopted to develop a decision making model. In addition, the Delphi Method was used to facilitate a consensus build-up among the relevant experts. The decision model developed in this study is a hierarchy structure. To achieve the goal to optimizing the inspection and control of mobile air pollution sources(motorcycles), evaluation and ranking of three alternatives(overall on-site inspections, follow-up inspections, and voluntary promotion) were conducted. Four criteria including basic conditions, policies and regulations, enforcement, and economic benefit and related 13 sub-criteria were evaluated. Expert Choice software based on the AHP, was used as a tool in this study. Through the participation of 12 experts, the weight of criteria and sub-criteria was determined. Subsequently the three alternatives for each sub-criterion were scored. And finally the ranking was established. The three sub-criteria “periodical inspection”, “emissions standards”, and “co-operation of owners” were the top of the 13. Among the three alternatives for inspection and control of mobile air pollution sources (motorcycles), overall on-site inspections was the most preferred, follow-up inspections the second and voluntary promotion the least.
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