in short it is an adaptive management cycle with planning implementation evaluation and adjusting activities within this general framework which is inherently sequential and not simultaneous it is relatively straightforward to calculate changes in landings revenues and costs this information could be useful to commercial sector stakeholders and managers but does little to capture the role of economic information in affecting catch and processing strategies then the fishery is monitored to obtain estimates of the management control variables and stock indicators that can be used to refine the biological model and or to solicit stakeholder input that is used to reestimate the assessment models to determine new estimates of stock status and then new management plans if necessary