Correct Way To Do Legacy MODERNIZATION - Value stream mapping (VSM) & Domain-Driven Design (DDD)

Sharing based on my 10+ years of experience at

• Unisys, $400M P&L

• Charles Schwab, Data & Digital Modernization

• Thomson Reuters, IT Director

• Vistra Energy, Sr Manager Enterprise Architecture

Typical Legacy System Challenges

• Vulnerability and Cybersecurity Risk

• Takes a lot of time to deploy business capabilities

• A ton of license spend

• Not able to find talent to support legacy systems

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Principles one should follow before starting to rewrite the CODE?

• Value stream mapping (VSM)

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• Domain-Driven Design (DDD)

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• Microservices

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Solutions - tools to help accelerate modernization

• Scenario 1: how do you find out the current state of apps, modernization readiness, and how bad the code smells?

  • [TBD, please check back soon]

• Scenario 2: how do you extract the operational intelligence on the ground without any documentation?

  • [TBD, please check back soon]

• Scenario 3: how can you modernize while business is moving at thousand miles per hour?

  • [TBD, please check back soon]