Reliability Evaluation of Pavement Life-Cycle Assessment Model

Table 1

Data quality evaluation matrix.

Quality grade	Judgement standard
	Selection standard	Technology correlation	Location correlation	Data sources	Acquiring methods	Time	Representation of data
5	Transparent, verified, and generally applicable	Representative process and representative technology	Represent value of local area	Verified data from independent source	Actual measurement	<3 years	Long time and large sample
4	Transparent, verified, and no generally applicable	Representative process and similar technology	Average value of local area	Verified data from relevant source	Measurement-based calculation	<6 years	Long time and small sample
3	Transparent, no verified, and no generally applicable	Representative process and different technology	Other area with similar production process	Unverified data from independent source	Hypothesis-based calculation	<10 years	Short time and large sample
2	Selective transparent and no selection standard	Similar process and similar technology	Other area with slightly similar production process	Unverified data from irrelevant source	Expert estimation	<15 years	Short time and small sample
1	Unknown selection standard	Similar process and different technology	Unknown location	Unverified data from relevant source	Calculation with no guaranteed quality	>15 years	Cannot be obtained