Why big-bang rewrites fail
On This Lesson 4 topics
This lesson is planned. The outline below lists the topics it will cover. The full lesson has not been published yet.
In this lesson
explain why rewrites usually fail and incremental migration works.
Planned topics
- The old system keeps changing while the new one is built, so the target moves.
- Hidden behavior in legacy is discovered late.
- No value is delivered until the end; risk piles up.
- Incremental migration delivers value early and can be stopped or reversed.
Draft outline details
Demonstration
a timeline comparing a 2-year rewrite with monthly extractions, showing risk and value over time.
Check your understanding
Why is incremental safer?
Show answer
Smaller steps, early value, reversible.
Practice
Apply this lesson with the module's lab, exercises and quiz.
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