Complex sentence: Confrontation analysis does not necessarily produce a win-win solution (although end states are more likely to remain stable if they do); however, the word "confrontation" should not necessarily imply that any negotiations should be carried out in an aggressive way.
Split into simpler sentences: Confrontation analysis does not necessarily produce a win-win solution (although end states are more likely to remain stable if they do). But also the word "confrontation" should not necessarily imply that any negotiations should be carried out in an aggressive way.