Reference architecture · Applied ML / NLP

A custom pipeline for a 40-year archive

OCR repair, entity resolution and a domain fine-tune turned an unsearchable corpus into a retrieval layer with a defensible accuracy benchmark.

01Applied ML / NLP

The problem

Forty years of documents, much of it poorly scanned, with entity names that changed spelling across decades. Off-the-shelf retrieval returned confident nonsense.

02Applied ML / NLP

What we built

We built a seven-stage pipeline: OCR repair, layout recovery, entity resolution against a canonical registry, chunking tuned to document structure, embedding, reranking, and a domain fine-tune for the last mile.

03Applied ML / NLP

What it proved

The headline number is the honest one: F1 rose from 0.63 on the baseline to 0.91 on the benchmark we built with their archivists.

What it is held to — illustrative figures

The numbers

Each figure is the measurement the system is held to. These are placeholders from the design comps until client-approved numbers replace them.

  1. Pipeline

    Measured continuously; a regression here fails the build.

    Applied ML / NLP
  2. Retrieval F1

    Measured continuously; a regression here fails the build.

    Applied ML / NLP
  3. Corpus

    Measured continuously; a regression here fails the build.

    Applied ML / NLP

This reference architecture sits under our applied ai & nlp capability. Its figures are illustrative until a client approves the real ones.

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Start here

Let's build
the impossible.

Tell us the system you can't get built. We come back with a short, paid discovery — a clear plan and a fixed first milestone — usually within two working days.

01

Discovery

A working session to map the problem and define what "good" is measured against.

02

The plan

Architecture, milestones and a fixed first deliverable — yours to keep, either way.

03

We build

Embedded with your team or as a dedicated pod, shipping with traces, evals and docs.

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