Discipline Artifact Incep. Elab.Const.Trans Iteration-% El.. En CL. Cn BusinessModeling Domain Model Requirements Use-Case model Ⅴ IsIon Supplementary Specification Glossary Design Design model SW Architecture document Data model Implementation Implementation Model srrrrssssrsr r Project Management Sw Development Plan Testing Test mode Environment Development Case Table 2. I Sample Development Case of UP artifacts, s-start; r-refine