From: Bo Weidema 
Sent: Wednesday, May 22, 2002 1:17 AM
To: methods@lcacenter.org
Subject: Re: Method Development - Limitations of Consequentia LCA
RESPOND TO THIS MESSAGE WITH ---REPLY TO ALL---

Tomas Ekvall wrote:

> the life cycle concept affected our perception of to what we are associated.
> This perception is initially purely subjective. However, all guidelines and
> standards on (attributional) LCA can perhaps be regarded as attempts to make
> the perception objective - to create an external normative rule that you are
> sceptic towards.

An external (i.e. inter-subjective) normative rule for attributional LCA would
be an interesting (although somewhat academic) challenge. So far, I have not
seen any attempts at this (disregarding those that eventually fall back on
consequentialist arguments). Are you aware of any?

> It also seems a bit crude to avoid suboptimisation through the use of static
> simulation modelling. Shouldn't we at least use optimising models?

The use of optimising models in LCA is definitively a good idea, and one of the
few remaining open and challenging research fields in LCI methodology.

Bo Weidema (http://www.lca-net.com)