Replication materials of the paper entitled: "Metamorphic Relation Construction: How Do Scientific Software Developers Do It?" Software information: Storm Water Management Model (SWMM) version: 5.1.015 SWMM Gighub: https://github.com/USEPA/Stormwater-Management-Model File 01-Interview transcripts and MR formulation result File 02-The screenshots of the functions prepared for the interview