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Unravelling Legacy Code: How X-Analysis Simplifies IBM i Application Documentation

Coding screen

Managing and modernising IBM i (AS/400, iSeries, RPG) applications can be a challenge.

This is especially true when you have to work with so-called ‘legacy’ code that hasn’t been documented.

As enterprises strive for digital transformation, the need for a robust solution to manage and document legacy code becomes vitally important. 

Enter X-Analysis, a powerful tool designed to simplify the intricacies of IBM i application documentation.

In this blog, we’ll explore:

  • The risks of maintaining IBM i applications without documentation.
  • How X-Analysis automates IBM i code analysis and application documentation.
  • The benefits of automated impact analysis, business rule extraction, and code visualisation for RPG and COBOL applications.

X-Analysis is recognised as the industry-standard for IBM i application documentation and code analysis.  Indeed, Proximity have also used X-Analysis as a key part of our IBM i support and maintenance services.  

Software programmers discussing about algorithms on big screen and laptop, analyzing html code language. Team of system engineers looking at database on terminal window, server interface.

The challenges of maintaining IBM i ‘legacy’ code

Before delving into how X-Analysis aids in application documentation, it’s crucial to appreciate the complex environment of IBM i systems. 

Many organisations still rely on IBM i (AS/400, iSeries) applications running RPG and COBOL code. 

Over the years, developers have retired or moved on, leaving behind undocumented programs with complex interdependencies.

Common challenges include:

  • Lack of documentation makes code maintenance and further development difficult.
  • High dependency on senior IBM i developers for knowledge transfer.
  • Risk of breaking functionality due to unknown dependencies.
  • Slow modernisation efforts due to poor application visibility.

Automate IBM i Application Documentation

X-Analysis by Fresche Solutions is THE leading IBM i code analysis tool that helps businesses document, understand, develop and modernise their legacy applications. 

By automating the documentation process, X-Analysis transforms the way organisations manage and understand their IBM i applications. It provides:

  • Automated Code Documentation: Generates complete IBM i program documentation, including data flows, dependencies, and business rules. This alleviates the burden of manual documentation, providing a clear map of the existing codebase.
  • Graphical Code Visualisation: Converts IBM i RPG and COBOL code into interactive flowcharts and impact analysis diagrams. This makes it easier for teams to conceptualize and understand complex applications.
  • Business Rule Extraction: Identifies key business logic embedded within RPG and COBOL programs, essential for IBM i application modernization.
  • Impact Analysis & Cross-Referencing: Understanding how changes to one part of the code affect other components is crucial. X-Analysis offers robust impact analysis, highlighting dependencies and potential issues before they arise.
  • Integration Capabilities: X-Analysis seamlessly integrates with other development tools, enhancing its utility across different stages of the software lifecycle, including TD/OMS an IBM i Change Management tool.

Business impact of IBM i code analysis

By using X-Analysis, IBM i enterprises can achieve several key benefits, including:

  • Enhanced IBM i application understanding with automated documentation, IT senior managers gain a better grasp of their systems, facilitating more informed decision-making.
  • Reduce technical debt by automating IBM i code documentation.
  • Improved maintenance as developers can quickly identify problem areas and understand the ripple effects of their changes, leading to more efficient maintenance.
  • Streamlined development and modernisation: as businesses look to modernise, having a clear understanding of their current state is invaluable. X-Analysis simplifies the transition to modern development languages and frameworks.
  • Minimise system downtime by reducing the risk of errors in IBM i software changes.

Real-world use cases of X-Analysis 

IBM i enterprises across various industries have used X-Analysis. This tool helps them maintain, support, and develop their IBM i applications. 

For example, a major financial institution used X-Analysis to document its many COBOL applications. This significantly cut down the time needed for system audits and upgrades.

A large manufacturing company used the tool to update its RPG applications to a modern framework. This change led to better performance and lower operational costs.

Conclusion: Embracing Change with X-Analysis

For businesses looking to future-proof their IBM i applications, using X-Analysis for automated code analysis and documentation is a game-changer. 

By making ‘legacy’ RPG and COBOL code transparent and easy to understand, IT teams can confidently maintain, enhance, and modernise their applications.

Ready to streamline your IBM i application documentation? Learn more about X-Analysis here.

We have created a video demonstration available on YouTube. It shows how to develop IBM i applications confidently using X-Analysis.

Check out the other IBM i software tools for development, modernisation and maintenance we provide.

Want to read more about IBM i Application Documentation?

Read (and watch the accompanying video) in this article entitled: Document, Manage, Enhance and Evolve Your IBM i Applications with Confidence with X-Analysis

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