The WG-EMM sub-group on methods is potentially in a position to change its emphasis from one that considers methods for collecting data as part of CEMP to one that considers and develops methods for analysing and using those data to provide management advice. Within this expanded role there are 4 key areas; 1.to maintain the process of validation and checking of the existing CEMP database, 2. to evaluate appropriate methods for analysis of existing parameters, 3. to develop methods to combine parameters at appropriate spatial and temporal scales and 4. to develop methods to take CEMP data forward as management advice.