A crude but efficient pipeline for JWST MIRI imager : the case of sn1987A

Most of the space projects or large observatories do have official tools like simulators, end-to-end pipelines developed during years by a large team of contributors. They are like {\em cathedrals}. In this paper, we show that very simplistic code using basic operators provided by high level language like GDL allows to write quickly high quality code to process raw data into scientifically validated outputs. This is {\em bazaar}. In this paper we argument why we consider large infrastructure should be designed to allow small ones to benefit from it and allow to graft better alternative processing at very low cost.