riskless & incremental transformation
Thanks to 100% automation, the new Java version is rebuilt every night (or more frequently) during the roll-out, based on the very last Cobol maintenance done over the day. It runs then at exact same functional level and collaboratewith Cobol system by sharing same database in real-time.
Interactive transactions by end-users and batch jobs can then be transferred in tiny increments toward Java system to avoid all risks : one by one, independently of all others, if so wished.
Thorough automated dual testing between legacy "green screen" (3270) and web interface (browser) guarantees strict iso-functionnality and top-level quality before the roll-out starts.
Application can migrated and rolled out by chunks as used by the various entities in your organization.