  This paper defines a new domain for collaborative systems and technologies
research: inter-organizational lean-interactive systems engineering. It departs
from the problems pertaining to large-scale, technically demanding one-off
construction projects, such as in our case studies, the building of specialized
offshore service vessels. The requirements are unique, as are the explicit
ambitions to be "lean", in other words, avoid waste and re-engineering by
making sure that the process is customer-driven and rational. Emphasis is on
efficiency rather than effectiveness. This set-up poses new demands to the
collaborative systems and technologies, which we in this paper have addressed
with the design of a new type of Documentation-emtric ERP, which we have called
"Paperstack". The ambition is to support inter-organizational lean-interactive
systems engineering in an integrated platform, and the next step for our
research, naturally, is to put the systems into factual use. This paper
summarizes the design ideas.
