Engagement models

Six ways to put our engineers to work.

The same teams, contracted the way your problem actually needs: by the person, by the outcome, by the milestone, or by the hour — with two models for when you need us on standby or need the capability handed over entirely.

  • Staff Augmentation

    Dedicated engineers/consultants embedded in the client's team, billed monthly per resource.

    Best when: You have the roadmap and the management, but not the hands — and hiring the skill set yourself would take two quarters you do not have.

  • Managed Services

    Outcome-based operations with SLAs (e.g., managed network, managed cloud, NOC).

    Best when: You want an outcome — uptime, response times, patch cadence — and would rather hold an SLA than a headcount.

  • Project-Based Delivery

    Fixed-scope, fixed-price projects with defined milestones and deliverables.

    Best when: The scope is known, the budget must be fixed, and success can be written down before the first line of work starts.

  • Time & Materials

    Flexible engagement billed on actual effort, ideal for evolving scopes.

    Best when: The scope is still moving — discovery work, R&D, or a system that only reveals its real requirements as you build it.

  • Retainer / On-Call Support

    Reserved capacity for advisory, support, and rapid-response needs.

    Best when: You need senior engineers reachable this week — not after a procurement cycle — for advisory questions, escalations, and incidents.

  • Build-Operate-Transfer (BOT)

    We build and run a team or capability, then transfer it to the client.

    Best when: The capability must end up in-house. We stand it up, run it to stability, then hand over the team, the runbooks, and the keys.

Side by side

Compare the six models

Four questions separate them: how you pay, how scope is fixed, who runs the work, and how long it runs.

Comparison of the six Zilk.ai engagement models
ModelHow it is billedHow scope is setWho directs the workTypical horizon
Staff AugmentationMonthly, per engineerOpen — driven by your backlogYou direct the work day to day3–12 months, renewable
Managed ServicesFixed monthly fee, SLA-backedDefined service boundaryWe operate to the SLA12 months and up
Project-Based DeliveryFixed price, per milestoneFixed and agreed up frontWe manage delivery to milestonesWeeks to months, per project
Time & MaterialsActual effort, invoiced as workedEvolving, re-planned as learnedShared — priorities set togetherAs long as it keeps paying off
Retainer / On-Call SupportFixed monthly reserveAdvisory + rapid responseYou call, we respondRolling monthly or quarterly
Build-Operate-Transfer (BOT)Phased: build → operate → transferA full capability, end to endWe manage, then transfer control12–36 months, three phases

Not sure which fits?

Describe the problem and the constraints — team, budget shape, deadline — and we will recommend a model in the first reply. Engagements can also change shape: many project-based deliveries hand off into a retainer.