Flow-chart representing the different stages involved in the generation of mock galaxy catalogues with BAM described in Sect. 2.2. The process is mainly divided into two sections: learning phase and mock production. In the learning phase, a number of kernels and halo biasses are calibrated from different realisations of the reference simulation and are stacked to generate one version of kernel and bias used in the mock production phase. The different colours in the arrows indicate the different stages involved in the process (e.g. calibration, generation of independent halo number counts, assignment of halo properties, construction of galaxy catalogues).