• Cost of no-action being defined on basis of ‘perceived’ inundated land and facilities plus references to number of people made homeless • Cost of various options mostly defined as ‘physical costs ‘ associated with structures plus un-costed ‘political’ consequences. •Lessons learnt :  worst case scenarios  do not always work;  lack of data forces huge guessestaimtes;  practically impossible to go for intrinsic values; figures always help to convince politicians