Age-metallicity relation of the young and intermediate-age clusters studied in this work. The clusters are colour-coded according to their cylindrical galactocentric distance, R. Clusters with less robust isochrone fits are illustrated with diamond symbols and grey error bars. Also shown are analytical models of the chemical evolution of the LMC (orange solid line) and SMC (green dashed line), assuming a bursting star formation rate (Pagel & Tautvaisiene 1998).