Quality Assurance

Is there a reliable way of doing a quality check or verification of a model’s LCA? How do you go about checking to avoid garbage in garbage out issues?

We have a model where we were initially estimating 30%+ carbon savings with respect to a baseline by switching most of the floors from steel deck with concrete topping for mass timber equivalents (still with concrete topping), but we are now estimating much lower ~6% savings. I’m trying to figure out how to best interrogate the inputs and outputs. Initially, it seems like we initially underestimated the foundations, the rest of the discrepancy, I can’t yet answer: I’m in progress.