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IVBIS / Engagement
How we engage

Few clients.
Deep engagements.
Clear commercial shape.

A small set of engagement shapes, named explicitly. Milestone-billed where work is bounded; retainer-plus-milestones where the relationship is the work. No multi-year master services agreement before you've seen us ship.

Concurrent clients
Capped at six
First milestone
Within 4 weeks
Commercial
Fixed-fee or milestone
Procurement
Passes vendor review
The flow

Four stages. Same shape every time.

The shape of an IVBIS engagement is fixed. The size of each stage isn't. Discovery is two weeks or four. Delivery is two waves or six. The structure stays. The cadence is yours.

Engagement structure

Frame → Plan → Deliver → Hand over
01 · FRAME

Frame

Read the system as it actually runs. Name the outcome. Find the load-bearing constraints.

  • Outcome statement
  • System context
  • Constraints register
  • Success criteria
02 · PLAN

Plan

Build the architecture map and a plan that traces to the PRD. PlanTrace produces the lineage.

  • Architecture map
  • PRD-linked plan
  • Cutover sketch
  • Approved scope
03 · DELIVER

Deliver

Iterate in waves. AI agents draft and test. Senior engineers gate every change. ArchTrace enforces.

  • Production-grade code
  • Test packs
  • Architecture gate
  • Milestone demos
04 · HAND OVER

Hand over

Runbooks, dashboards, on-call rotation. Same engineers do the handover who did the build.

  • Runbooks
  • Observability
  • On-call rotation
  • Decision records
Three shapes

Three engagement shapes. One of them fits.

We don't try to be all things. Engagements fit one of three shapes, sized and priced honestly. Pick the smallest one that solves your problem; bigger ones exist when the answer is genuinely a longer relationship.

01 · DISCOVERY

Discovery

A short, fixed-fee engagement to frame the problem honestly before anyone signs a delivery commitment.

Duration
2–4 weeks
Pricing
Fixed-fee
Team
1–2 seniors
Output
Architecture map, plan, recommended next step
Best when: the right scope isn't obvious yet, or the system needs reading before it can be priced.
02 · WAVE

Wave

A bounded delivery engagement — a module, a migration, a greenfield service. Milestone-billed against a plan signed up front.

Duration
10–14 weeks
Pricing
Milestone-billed
Team
3–5 seniors
Output
Production system, runbooks, handover
Best when: scope is clear, the outcome is testable, and the system is ready to ship in a known window.
03 · STRATEGIC PARTNERSHIP

Strategic partnership

A standing engagement across multiple waves and a programme of work. Retainer plus milestone, named team, multi-quarter horizon.

Duration
6–12 months
Pricing
Retainer + milestones
Team
Named team
Output
Programme of waves, platform extensions, shared roadmap
Best when: the work is the relationship — a programme rather than a project, and continuity is what compounds.
The commercial model

A short, honest paragraph where most firms put a rate card.

We don't publish a rate card because a rate card invents a precision the work doesn't have. Pricing is by milestone for delivery, fixed-fee for discovery, and retainer-plus-milestone for strategic partnerships. The number is the price for the outcome we both signed off on, not a function of how many hours got logged.

What that buys: a single price that covers the whole stage, a single point of accountability if it slips, and no incentive on our side to keep the work going. We are slightly worse off when an engagement takes longer than planned, which is the structural property a buyer should actually want from a vendor.

What it doesn't buy: change-order revenue. If scope expands meaningfully, we re-plan rather than re-bill — and we say so before we start. A new wave is a new wave. An old wave doesn't get more expensive halfway through.

What we ask · What you can expect

Two short lists. Equally short on both sides.

What we ask

The minimum we need to do the work properly.

  • OwnerOne named person on your side who can approve scope and unblock decisions in the same week they're raised.
  • AccessRead access to the codebase, the architecture, and at least one production-like environment. Sooner rather than later.
  • HonestyTell us what the system actually does, not what the requirements doc says it does. Tell us where it's fragile.
  • TimeTwo hours a week of the named owner's time. More in discovery; less in delivery.
What you can expect

The minimum we owe you back.

  • Same teamThe engineers on the engagement are the engineers on the page. No bait-and-switch, no juniorisation, no resource churn.
  • Weekly cadenceA short written update every Friday. What we shipped, what we didn't, what we changed our mind about, and why.
  • Production postureEverything we ship has tests, runbooks, observability, and a rollback path. By default. Not as an upsell.
  • CalibrationIf something we tried isn't working, you hear it from us before you hear it from anyone else.
Procurement notes

Designed to pass a procurement review.

A short list of the questions vendor management always asks, with the answers in plain language. If you'd rather skip the back-and-forth, the same content is in a single-page PDF below.

Insurance

Professional indemnity and cyber, with limits raisable on request.

Standard cover is in place from a top-tier carrier; higher limits can be added for the engagement at marginal cost.

Data handling

Client data stays in client environments.

We don't take production data into ours. AI agents run in the client cloud or on a bring-your-own-key model. Records on request.

Sub-processors

Named, audited, kept short.

We use the model providers and infrastructure you'd expect, and we publish the list. We don't add anyone to it without telling you.

IP ownership

Client owns the delivered work. We own the reusable platform.

Code we write for you is yours, fully assigned. Reusable agents and playbooks remain ours and are licensed to you for the engagement and beyond.

Exit

30 days, no penalty, with a real handover.

Either side can exit on 30 days. Handover is included, not a separate line item. The system you take with you runs without us.

Compliance

SOC 2 Type II. ISO 27001. GDPR DPA.

Reports and the DPA template are available under NDA on request. We're happy to sign yours instead of using ours.

Procurement one-pager
ungated · 1 page · 96 kb · updated may 2026
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Engagement

Fewer clients. Deeper work. Higher leverage.

Start with a sentence about the engagement you have in mind.
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