Life cycle-based sustainability assessment methods and life cycle thinking are well implemented in many kinds of activities within the different process industry sectors. However, there is room for further improvement and mainstreaming the use of the methods, and especially for integrating the methods in different processes capable of providing decision-support on a daily basis. Important drivers for sustainability assessment originate from the strategic choices of individual companies, and from the demands and recommendations of the underlying policy framework. New development needs seem to arise, as the understanding of different aspects of sustainability increases, and as the demands from stakeholders become more frequent.