Automated EPUB Validation at Scale
Automated EPUB Validation at Scale
Validating and remediating 5,366 EPUB titles against a fixed deadline through an automation-driven framework built for scale.
The Challenge
A leading trade publisher faced a CRASH-priority mandate: validate and remediate 5,366 EPUB titles within a fixed timeline that had no room to move. At that volume, manual review alone would have meant longer timelines and more inconsistency across the catalog.
The Partnership
Six Red Marbles and the publisher worked through the scope and urgency of the mandate together, aligning early on a scalable, automation-driven approach to remediation.
The Strategy
Six Red Marbles built an automation-driven framework instead of converting every title individually.
- ✓Identify recurring structural errors across the catalog to target the fixes that mattered most.
- ✓Apply batch-level remediation built around those error patterns.
- ✓Reduce manual intervention at every stage of the workflow.
- ✓Preserve content integrity across all 5,366 titles.
Automation ran inside disciplined quality checkpoints throughout, keeping accuracy intact at scale.
What Six Red Marbles Designed and Delivered
Six Red Marbles built and ran an automation-first remediation workflow sized to the full catalog:
- Automated validation and remediation workflow
- Structured error pattern analysis
- Batch-based correction scripts
- Quality assurance checkpoints built to scale with the catalog
The Learning Experience
Across all 5,366 titles, readers experienced the same dependable formatting and structure, regardless of which title, device, or reading app they opened it in. That kind of consistency, at that volume, on that timeline, is what an automation-first framework makes possible.
The Impact
All 5,366 titles were validated and delivered within the deadline, with meaningfully less manual effort than a title-by-title approach would have required.
Why It Matters
As publishing portfolios grow, scalable production depends on workflow intelligence, not just added headcount. This case shows how automation, built into a mature production process, lets publishers manage large content ecosystems predictably and reliably.

