This book clarifies a number of methodological issues in Life Cycle Inventory modelling, as part of LCA. Some of these issues have been on the agenda for a long time, without coming to generally accepted solutions, and often not even to agreement on alternative approaches. Several of these subjects relate to the specific nature of LCA as a relatively simple method for decision support, focusing on technology relations in the life cycle. By this focus, it is simple enough to be operable by 'small' users, but at the cost of leaving out many mechanism which are operant in reality. The report...