Which of these is not an advantage of EIO-LCA in comparison with the "bottom-up" approach? Question 1 options: There is no need to be concerned with defining system boundaries. The data used in EIO-LCA are, for the most part, already collected by the federal government thereby obviating the tedium of the inventory stage. Software models are readily available to carry out the analysis. While a "bottom-up" LCA may take months or even years to complete, EIO-LCA typically takes a few hours. At this level of aggregation much information is lost, especially on how the system actually functions