AI BriefingNTT DATA Group Cuts Incident Analysis Time to 30 Minutes with Codex
Key point
NTT DATA Group rolled out OpenAI Codex to about 9,000 people, cutting incident analysis that used to take 5 engineers 3 days down to 30 minutes.
Details
NTT DATA Group deployed ChatGPT Enterprise company-wide after forming a global strategic partnership with OpenAI in May 2025. In an internal survey, over 96% reported satisfaction and over 95% reported improved productivity, and this experience laid the groundwork for adopting Codex.
As an early success case, Codex completed a complex incident analysis task on a core system—one that used to take 5 skilled engineers 3 days—in just 30 minutes (-99.3%). This result caught the attention of management and became the catalyst for expanding Codex adoption.
Currently, about 9,000 employees are using Codex, and beyond engineers, non-technical staff are also using it for building lightweight tools, organizing large files, analyzing Excel data, summarizing documents, and scripting repetitive processes. NTT DATA is pushing forward with internalizing AI through its 'Client Zero' approach, treating itself as its own first customer.
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