Welcome to ROI Detective Agency

── Uncover the Truth Hidden in the Maze of Numbers ──


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🆕 【What's new】

📅 2025-07-15 Released our AI Toolkit — a microservice suite of generative AI tools

📅 2025-06-29 Add report page to header navigation

📅 2025-06-22 Kindle book 'The Irresponsible Conspiracy' published by ROI Detective Agency


🎖️ Top 3 Weekly Ranking of Classified Case Files

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Case File No. X039_HEART
What is the HEART Framework

The HEART Framework that quantitatively measures qualitative experiences. A 5-dimensional UX evaluation system developed by Google that enables the transformation from subjective assessment to scientific improvement. Decode the cipher of th
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Case File No. X034_BLUE_OCEAN
What is Blue Ocean Strategy

Create uncontested market space with 'Blue Ocean Strategy.' Decode the cipher of value innovation that generates new market creation.
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Case File No. X042_KANO
What is the Kano Model

The 'Kano Model' decodes the non-linearity of customer satisfaction. Must-be Quality, One-dimensional Quality, Attractive Quality—decipher the code woven by these three elements for discovering true customer needs and creating strategic val
📖 The Ultimate Choice

"Murder on the Orient Express" VS "And Then There Were None"

"Justice of the many, or justice of the solitary?"
── ROI Detective's Memorandum
Murder on the Orient Express
Twelve accomplices judged one extreme villain.
What existed there was
consensual justice
by the will of the community.
VS
And Then There Were None
One judge tried ten criminals.
What existed there was
autocratic justice
by solitary conviction.
Which train would you board?
📚 Read "Murder on the Orient Express" on Amazon 📚 Read "And Then There Were None" on Amazon

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