Build 03 — AI Tool Build

Custom AI software
your team actually uses.

A standalone application shaped around how your operational team works: an internal copilot, a decision-support dashboard, an intelligent workflow tool or a client-facing portal. Prototyped with your team, live in eight to twelve weeks, and maintained as their needs change.

Designed with your team · Built on your data · Maintained after launch

01 · You bringToday

Expertise that lives in people’s heads.

  • Questions only one or two seniors can answer
  • The same judgement made over and over, by hand
  • Years of case data nobody can search
02 · We build8–12 weeks

A tool designed with the people who’ll use it.

  • Their workflow mapped in the Hypothesis stage
  • A prototype piloted with a small group, on real work
  • Rebuilt from what the pilot taught us, integrated with your systems
  • Your know-how built in as guidance, checks and examples
03 · You getFrom launch

Software your team opens every day.

  • Answers in the tool, with the source cited
  • New starters working to the senior standard sooner
  • Trained during rollout, not after
  • Application Maintenance as the work changes

Everything you need to put your expertise in everyone’s hands.

01

Built around how your team really works.

We sit with the people who do the work, map their decisions and the data behind them, and design the tool around that, not around a generic template.

Hypothesis stage · workflow analysis
role
senior analyst
the decision
approve, amend or escalate a case
what they reach for
the case file, a precedent, the policy
where the time goes
finding the precedent — 25 minutes a case
02

A prototype your team tries first.

A minimum viable tool goes to a pilot group on real workflows, so their feedback shapes the product before production scope is locked.

pilot · week 2
users
6, from the team that will live in it
sessions
214 on real cases
feedback
37 items, three of them scope changes
decision
scope agreed with the team, then production
03

Your domain knowledge, codified.

What lives in five people’s heads becomes guidance, checks and examples inside the tool, so newer team members work to the same standard.

knowledge/guidance.yaml · examplerule: escalate if exposure > £250k source: credit policy §4.2 example: case #1184 owner: head of risk
04

A production app in your stack.

The tool is rebuilt from what the pilot taught us and integrated with your existing systems, with custom AI inside where it earns its place.

production · integrationssso ✓ microsoft entra crm ✓ read / write documents ✓ sharepoint ai ✓ retrieval over case files
05

Rolled out, then kept current.

Your team is trained during rollout, not after. Application Maintenance keeps the tool fresh and adds features as the work changes.

maintenance · this quarter
features shipped
4, from the team’s own requests
requests open
6
sources refreshed
monthly, outdated documents flagged
adoption
41 of 45 people, weekly

Stop relying on memory.
Start relying on the tool.

Your expertise is the asset, but it sits in people’s heads. The same kind of work comes round again and again, years of data go unused, and every new starter takes months to reach the standard of the people who trained them.

See how bespoke AI is changing the way UK professional services businesses work →

Today
  • Know-how held by a few senior people
  • The same questions answered by hand, over and over
  • Years of case data nobody can search
  • New starters taking months to get up to speed
  • Off-the-shelf software the team works around
After twelve weeks
  • Know-how built into a tool everyone uses
  • Routine questions answered in the tool, with sources
  • Your own data searchable and put to work
  • New starters working to the same standard sooner
  • Software shaped to how your team actually works
How we build this

The Science of AI Specialisation™

From workflow analysis to a tool your team uses daily, in four clear stages. The same method runs through every Ferrous Labs build.

wireframe · case assistant

workflow analysis → UI/UX vision → build brief

01HypothesisHypothesis

Analyse the workflow

Workflow analysis, UI/UX vision and scope. The output is a build brief and a design direction your team can sanity-check.

prototype · pilot with 6 users
Which precedent applies to a £250k exposure?
Case #1184 — escalate under credit policy §4.2.source ✓ · answered in 40 s
02ExperimentExperiment

Build the prototype

A minimum viable tool, piloted with your operational team. Real workflows, real users and real feedback before production scope locks.

CRM✓ read / write
documents✓ SharePoint
AI✓ retrieval over case files

integrated with the systems your team already runs

03FormulationFormulation

Production app

Reconfigured from the prototype data and integrated with your existing systems, with optional custom AI inside. Ready for organisation-wide rollout.

week 112 of 45
week 227 of 45
week 441 of 45

weekly active users · trained during rollout

04ExecutionExecution

Roll out + maintain

Your team is trained during rollout, not after. Application Maintenance keeps the tool fresh and adds features as your team’s needs evolve.

AI Tool Build

How the build runs

Scoping call first · 8–12 weeks · Maintained after launch

Before we start

Scoping call

A co-founder learns how your team works, and whether a tool is the right answer.

Weeks 1–12

Hypothesis → Experiment → Formulation → Execution

Analyse the work, pilot a minimum viable tool with your team, then build the production app.

From launch

Rollout + maintenance

Your team trained during rollout; Application Maintenance adds features as needs change.

What you walk away with

A tool your team uses every day, with your expertise built in, and a partner who keeps improving it.

Live appA standalone application in daily use
8–12 weeksFrom workflow analysis to production
CodifiedYour domain knowledge built into the tool
AdoptedDesigned with your team, trained during rollout
IntegratedConnected to the systems you already run
MaintainedApplication Maintenance as your needs evolve
Common questions

Custom AI software development:
questions answered.

What is custom AI software development?

Custom AI software development is the design and build of an AI-powered application around one organisation's own processes, data and domain language, rather than configuring an off-the-shelf product. The output is a working tool your team opens and uses — typically an internal copilot, a decision-support dashboard, an intelligent workflow interface, or a client-facing portal. It differs from buying an AI product in that the interface, the model behaviour and the integrations are all shaped by how your team already works.

What is an AI Tool Build?

An AI Tool Build is a standalone application your operational team uses every day. Common examples include internal copilots that answer questions using your company knowledge, decision-support dashboards that surface AI-generated recommendations, client-facing portals, and intelligent workflow interfaces. Every tool is built around how your team actually works, not a generic AI template.

How long does it take to build a custom AI tool?

A typical AI tool build takes eight to twelve weeks from kickoff to a working tool in your team's hands. Timeline depends on integration complexity and data requirements rather than feature scope — we scope tightly to what your team actually needs rather than building for hypothetical future requirements.

What is the difference between an AI Tool Build and AI Workflow Automation?

An AI Tool Build produces an interface your team interacts with actively — a copilot they query, a dashboard they use to make decisions, or a portal clients access. AI Workflow Automation runs in the background without requiring active interaction, handling process steps end to end with minimal human involvement. Both can be complementary: a tool build might feed outputs into an automated workflow.

Do we own the custom AI software you build?

Under a Delivery Partnership you commission and own the build outright, including the source code. Two other models are available — a Revenue Partnership, where you pay less up front and we take a share of the revenue, and an Equity Partnership, where Ferrous Labs takes equity in the resulting product. The model is chosen before the Formulation stage, once the Hypothesis and Experiment stages have made the scope clear, rather than agreed before anyone understands the work; Revenue and Equity Partnerships are available from Formulation onwards. — see how partnerships work.

Which company builds custom AI software in the UK?

Ferrous Labs is a London-based AI engineering studio that builds custom AI software for UK businesses — internal copilots, decision-support dashboards, intelligent workflow tools and client-facing portals, each scoped, built and maintained end to end. Using The Science of AI Specialisation™, a typical tool goes live in 8 to 12 weeks and integrates with the systems your team already uses. Ferrous Labs works with UK specialist technical firms, client-service businesses and document-heavy operations across London and nationwide — see delivery case studies →

Further reading

Go deeper on this.

Custom AI Software Development: How the Process Works

Read the guide

Bespoke AI Solutions for Business: What Counts as Bespoke

Read the guide

What Is Bespoke AI Software and When Is It Worth It?

Read the guide

How to Add AI to Existing Software Without a Rebuild

Read the guide

Show us the expertise in your team’s heads. We’ll put it in their hands.