The household economy approach
The HEA uses a model based on household data for a define reference period in which conditions are known, i.e., a good or bad year to estimate the change in household's food access which would be excepted from a shock or change in a current prediction year, factoring in the amount of food and non-food goods which the household should be able to obtain and the types and acceptable use of coping strategies e.g. a household might survive by selling all its livestock, but in policy terms this might be considered undesirable.
The reference data set includes the distribution of household membership, asset holdings, employment opportunity, access to wild foods and transfers.