The Australian Data Archive has developed a proposed workflow for the harmonisation of social survey data, that takes account of the practical steps required to bring diverse content together in a machine-actionable way. This harmonisation workflow includes pre-processing of metadata consistent with established archival practises, and incorporates external registered, persistent content. The workflow is oriented towards improving FAIR practices in the harmonisation process - through the use of reusable, accessible metadata structures that can both improve processing consistency for current projects, and be applied to future harmonisation projects. There is a need for consistent pre-processing of data and metadata within repositories to reduce error handling in the harmonisation process. The ADA have developed an initial set of processing rules that will be implemented in CARAT.