In order to better deal with the complexity in multi-issue negotiation, a q
uantitative method which produces Pareto optimal solutions through jointly
improving exchange of issues is proposed. The trade-off process is modelled
using logrolling, in which loss in some issues is traded for gain in other
s, resulting in overall gain for all parties. This mutual gain approach is
designed based on the integrative negotiation strategy. The objective of th
e logrolling method is in negotiation support by providing a structure and
systematic analysis for ill-defined multi-issue negotiation problems. This
study presents a formal representation of logrolling, the sequential logrol
ling procedure that is based on the exchange of two issues, and the general
properties of the efficient frontier produced by logrolling under a linear
preference assumption. The study also includes some discussion on implemen
tation aspects of the logrolling method.