Case Study: Fortune 500 Transportation Company achieves accelerated, low-risk mainframe modernization with CAST Software's Application Intelligence Platform

Accelerating the Modernization of a Mainframe Based “Moving Target” While Mitigating Risk

A Fortune 500 transportation company engaged Princeton Consultants to modernize a decades‑old mainframe CICS/COBOL application that manages planning and daily operations. The large, poorly documented codebase and a history of siloed development hid critical "silent" dependencies, making risk‑averse, phased migration planning difficult while executives required continuous operation and the ability to roll back components if needed.

Princeton Consultants deployed CAST Software’s Application Intelligence Platform to automatically blueprint code by business function, reveal dependencies, and quantify complexity, giving teams a single visual model of the entire system. The outputs accelerated design and planning, enabled independently scoped migration projects with realistic effort estimates, and produced a dependency‑aware sequence and timeline — delivering a phased modernization that remains on schedule and within budget while preserving system continuity.