Apart from inquiring about learning context, potters socio-economic status, production and selling contexts, these fieldwork missions aimed to record the different ceramic “chaînes opératoires”, from clay extraction to firing, and their variants depending on morpho-metric types. The detailed understanding of techniques and methods along with collection of potteries has allowed the constitution of a unique reference data base of micro/macro-traces , which will be used to interpret in terms of manufacturing techniques and methods ceramics from central and southern Ethiopian megalithic sites, dated between 8th -15th AD.