PURPOSE: To control the execution of a molded work process and to edit the tasks while changing their executing sequence by performing the mutual communication between a server and plural viewers via a common message bus and making a user use a producing or correcting viewer based on the work process which is controlled by the server.

CONSTITUTION: A process starts when a submitter 10 submits a bug report 10a contained in software to a tester 12. The tester 12 triesto reproduce a bug in the software so that the bug is described in the report 10a. When the reproduction of the bug is possible, the report 10a is given to a programmer 14 with a prescription to detect and eliminate the bug. The programmer 14 has three options to complet, detect and eliminate the bug. When the programmer 14 corrects the bug, the software having the corrected bug is sent to the tester 12. Meanwhile the tester 12 returns the report 10a to the programmer 14 when a fact that the bug is not corrected yet is detected.