The methodology that gets migrations delivered.

Practical Data Migration is the business-first method for enterprise data migration: proven over three decades, published by the British Computer Society, practised by certified professionals worldwide.

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By Johny Morris · Third edition · BCS, The Chartered Institute for IT

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PDM Academy

The PDM course, hosted right here: video lessons narrated in Johny's own voice, the DHGS case study, quizzes, and your completion certificate. Free to start, with new modules added as the course grows. Track your progress and learn at your own pace.

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Four principles hold it together

Business first

Migration decisions are driven by business outcomes, not technical convenience. The business owns the data, and the migration.

Engage the experts

The people who know the data best are involved from day one. Subject matter experts are essential, not optional.

Fit-for-purpose quality

Quality is defined by what the target system needs, not abstract perfection. A migration is not a cleansing project.

Measure everything

Progress, quality and completeness are quantified, never assumed. What you cannot measure, you cannot manage.

Wall to wall, floor to ceiling

PDM covers the complete floor space of a migration: two workstreams, nine modules, from the first strategy decision to the day the legacy system is decommissioned. Use all of it, or use it as the checklist that proves you have no gaps and no overlaps.

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PDM end-to-end process diagram showing the nine modules across two workstreams

"You'll spend more time on a data migration working with your business partners and colleagues than you will with the actual technology."
Johny Morris · Watch the presentation →