IBM COBOL Upgrade Advisor for z/OS is a software tool that inventories COBOL assets, assesses upgrade readiness, and recommends compiler option changes to support upgrades to Enterprise COBOL for z/OS 6.x.
Published Oct 13, 2026
Source: https://www.ibm.com/support/pages/fix-list-ibm-cobol-upgrade-advisor-zos
No dedicated CUAZ customer case study pages with quantified outcomes were found in the accessible public sources during this research.
IBM’s Enterprise COBOL documentation library references a COBOL upgrade portal that aggregates upgrade-related resources, including an interactive demo, webinars, and case studies. This suggests case studies may exist on the portal, but specific customer stories and metrics were not directly accessible from the excerpted page content.
Source: Official vendor documentation and product pages
IBM’s announcement includes a performance claim for the compiler and hardware (for example, a cited CPU usage reduction on IBM z17 for Enterprise COBOL 6.5). This claim relates to the compiler and platform rather than CUAZ itself and is based on IBM internal measurements with specified options and environment; actual results may vary in customer environments.
Source: Official vendor announcement and press materials
Most appropriate for:
Note: CUAZ-specific customer size data is not publicly disclosed; this ICP is inferred from typical IBM Z adoption patterns and the product use case.
Source (IBM’s framing of COBOL-heavy industries): Official vendor announcement and product overview
Get a comprehensive analysis of IBM Cobol Upgrade Advisor Zos including market position, competitive landscape, adoption trends, and peer benchmarks.
Download full report →Source: https://www.ibm.com/products/cobol-upgrade-advisor-zos
CUAZ is a relatively new IBM Z product (GA May 9, 2025 per IBM). Unlike mass-market SaaS products, IBM Z tools often have limited public reviews on common platforms such as G2 or TrustRadius. During this research:
This means the customer review section must rely more on:
Because CUAZ-specific user quotes were not readily available, the closest authentic signals were:
Examples (not CUAZ-specific, but relevant context):
Source for IBM’s rationale and risks (uninitialized data, extensive testing): Official vendor announcement and product documentation
IBM COBOL Upgrade Advisor for z/OS (often abbreviated CUAZ) is an IBM Z software product designed to reduce the effort and risk associated with upgrading large COBOL estates to IBM Enterprise COBOL for z/OS 6.x. The product supports the planning/scoping and readiness phases of compiler upgrades by inventorying COBOL assets (compiler versions, compile options, metadata), identifying prerequisite tasks, and recommending compiler option changes—presented in a Visual Studio Code-based interface.
IBM describes CUAZ as a tool to assist with modernization-related upgrades (to supported compiler levels and to enable use of COBOL 6 features and hardware capabilities) rather than a full application modernization or language-conversion suite (for example, it does not perform COBOL-to-Java conversion). IBM announced CUAZ 1.1 with general availability planned for 2025.
Key advertised capabilities (high-level):
Primary sources: