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Brownfield environment

A brownfield environment is an established technology landscape whose systems, infrastructure, data, processes, or dependencies must be retained, integrated, modernized, or changed.

How 3 Manning books explain it

First-Party Data Activation

A brownfield approach modernizes, migrates, or extends an existing system while accommodating its legacy data, processes, infrastructure, and dependencies.

How it is used
Frames modernization of an existing marketing data platform as a migration that must preserve operations while establishing a lakehouse.
How deep it goes
Outlines phased migration, parallel validation, logging, and cutover criteria at a planning and operational level rather than as code instructions.
Examples
Uses an apparel retailer’s legacy warehouse, Shopify orders, email platform, and campaign pilot to illustrate phased modernization.
What you can do after
Practice/perform it: plan a phased migration, verify parity with legacy reports, and retire the old system against defined exit criteria.

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Infrastructure as Code, Patterns and Practices: With examples in Python and Terraform

An existing environment containing active infrastructure resources that were created or managed before the current infrastructure-as-code definition.

How it is used
Guides migration from manually managed mutable infrastructure to reproducible immutable infrastructure as code.
How deep it goes
Explains inventory, dependency ordering, state matching, migration choices, and drift risks without detailing provider-specific commands.
Examples
Uses development networks, servers, databases, load balancers, firewalls, and DNS entries as migration targets.
What you can do after
Apply an ordered migration that captures existing resources in IaC while minimizing accidental changes caused by drift.

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The Art of AI Product Development

A brownfield scenario is a product-development situation in which new capabilities are integrated into an established product, system, or user base.

How it is used
Guides opportunity selection, risk management, and resource allocation when adding AI to established products.
How deep it goes
Explains the scenario, benefits, integration risks, and initial prioritization guidance without detailing implementation.
Examples
Uses financial analytics, corporate sustainability reporting, data analytics governance, and e-commerce recommendations as examples.
What you can do after
Evaluate brownfield AI opportunities and plan for integration, governance, infrastructure, and adoption risks.

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Related concepts

These guides are generated from the text of Manning books by Manning's knowledge graph and link to the sections they draw on. The full books are available on liveBook and at manning.com.