STEP files for use with StrEmbed software prototype

Three sets of STEP files are presented for use with the StrEmbed software prototype for investigation of design configuration spaces. STEP files are a standard data exchange format for the representation of engineering design bills of materials (BoMs). BoMs for two test cases - a five-piece puzzle and a torch - and one case study - a railway carriage - are presented. Three STEP files for each are provided. All can be loaded into the StrEmbed software, which is available at Github here: https://github.com/paddy-r/StrEmbed-6-1. The STEP files were created at the University of Leeds by Hau Hing Chau.