Analysis of the uncertainty of life cycle inventory

Based on the multivariate linear regression model and the theory of the partial regression squares,the uncertainty of life cycle inventory is analyzed.Firstly the five aspects of data quality are quantificationally analyzed,and the probability distribution of the data is determined based on the common data quality index method.Then the regression analysis of the inventory input data is carried out,and a regression model is set up to calculate the total uncertainty.Through the calculation of the sum of the partial regression squares of inventory,the data which have marked impact on the regression dependent variable Y are obtained,so the uncertainty caused by the data can be obtained.The method is used in the life cycle inventory of a dishwasher to verify its feasibility.