1. A method for detecting nets physically changed and electrically affected by a design ECO, comprising steps of: executing an ECO on an IC design to produce a post-ECO IC design; identifying, by comparing a pre-ECO database with a post-ECO database, a first group of nets of said IC design physically changed by said ECO; parsing a pre-ECO design SPEF file of said IC design with a script to identify a second group of nets in said pre-ECO database based on said first group of nets, said second group of nets being coupled to said first group of nets; extracting parasitics for said first group of nets in said post-ECO database to generate a parasitic data file for said first group of nets; parsing said parasitic data file with said script to identify a third group of nets in said post-ECO database based on said first group of nets, said third group of nets being coupled to said first group of nets; and generating a file listing said first group of nets, said second group of nets and said third group of nets.