This Report provides guidance to those working on design activities ranging from major capital projects to minor modifications. Firmly based on process safety event data reported to IOGP, this Report highlights a set of Process Safety in Design (PSiD) insights which illustrate some of the more common design pitfalls and opportunities. The specific PSiD insights are framed within a set of overarching Process Safety in Design principles. The intent of this Report is to provide greater line of sight to the learning available within IOGP process safety data and enrich the process safety dialogue within local design teams.