Stanford University
Stanford EngineeringEIO-LCA Explorer CEE 226 · Life Cycle Assessment for Complex Systems

Frequently asked questions

When should I use it?

For the input-output values in the assignments, and for the parts of a term-project LCA that have no process data in SimaPro: map the step to the closest sector, run the dollars involved, and record in your data-quality discussion that the step was estimated with sector-average input-output data. That is the hybrid method from the design module.

Is this a replacement for SimaPro?

No. SimaPro is the course's process-LCA tool and stays where it is. This tool gives sector averages for the 2012 U.S. economy, in dollars: right for screening, background processes and gaps; wrong for product-level claims, for comparing two designs within one sector, or for anything the project brief asks you to model as a process.

Why does the course host its own copy?

So the model version is fixed for the quarter, the number you cite in week three is the same in week ten, and the air-emission flows, the price conversion and the citation block the assignments use are in one place.

Who maintains it?

The CEE 226 teaching team. Bring a number that looks wrong to class, with your inputs.