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I am learning openLCA these days and found one problem while studying the ceramic cup vs paper case.

With the database, I can get exactly the same figure as in fig. 8, but very different data as in fig. 9.

image.png

As the document shows, fig. 9 is the "influence of the different processes", but while calculating the systems, I do not have the value of transport processes straightforward because they are not directly connected to the "Ceramic mug use - by hand". My contribution tree looks like the following, which is different from fig. 9:

image.png

I thought that is because transportation is part of the production process so I broke it and added the numbers myself. The items with a red dot are considered "transport". The rest in ceramic mug production is considered "production".

image.png

However, my results still look very different from the document.

In my case, washing is 94.58%, production 4.49%, transportation 0.98%, waste treatment 0.01%, whereas in the document the washing is only about 85%,waste treatment about 8%.

The problem exists in all categories, not just in climate change.

Is there something wrong with the math I did or I did not understand the situation correctly?

I would appreciate any and all help!

Many thanks!

in openLCA by (140 points)
edited by
by (140 points)
Definitely. It is attached now. Many thanks.

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