To achieve easy transition between a production information screen and a trace data screen.

A system for linking a production information screen with a trace data screen comprises a production information file folder for saving production information files, and a trace data file folder for saving trace data files. The production information filename is composed of a wafer number and the date and time of forming the production information file, and the trace data filename is composed of a wafer number and the date and time of forming the trace data file. Retrieving between the production information filename and the trace data filename enables the transition between the production information screen and the trace data screen.