A paper was recently published on Perdigões temporalities. It can be download here.
Based in a set of 35 radiocarbon dates, an image of progressive growing of the site is emerging. Starting with to central enclosures dating from Late Neolithic (second half of the 4th millennium), grew bigger with the intermediate wavy ditches dated from the second quarter of the 3rd millennium and finally with construction of the ditch 1 in the topo of the amphitheater slope in the second half of the 3rd millennium.
However, this image of a progressing growing must be seen as provisory, since several ditches still to be dated, namely the one that runs partially out of ditch 1 and is cut by it. If this ditch is older, Neolithic for instance, than the site was big since the beginning.
This is an important step into the Perdigões temporalities, but is still just a step. Further research is needed to provide a complete image of the diachronic development of this impressive set of enclosures