If you are planning an experiment for which you would like analysis support, the best time to approach the Bioinformatics Core Facility would be before you are collecting or preparing samples and prior to any data being generated. This is to ensure that good experimental design procedures are observed and that the experiment is sufficiently powered to answer your biological question of interest and any potential confounding factors have been addressed.
To quote R.A. Fisher: “To consult the statistician after an experiment is finished is often merely to ask him to conduct a post mortem examination. He can perhaps say what the experiment died of.”
