IVD Product Development, From Working Assay To Commercial Scale
Inertia is a North American IVD product development partner serving funded diagnostics companies and established OEMs. We take a working assay through integration into the instrument, cartridge, workflow, evidence package, and manufacturing path. By connecting architecture, reagent stability, design controls, verification, and transfer early, we help IVD programs carry cleanly from feasibility through submission and scale.
Inertia Group Inc. (Toronto) is certified by Intertek to ISO 13485:2016 for the contract design, development, and manufacture of active and non-active medical devices. Our Guangzhou facility is certified to ISO 13485:2016 for medical device manufacturing.
Why IVD development programs stall:the system around the assay
Many diagnostic programs start with promising science and stall when that science meets an instrument, a regulator, a user, and a production line. The failures are usually structural, not scientific.
What integrated IVD development looks like across a program
Each scenario below follows the same program through connected decisions, from assay translation to manufacturing transfer, so you can see where integration changes the outcome.
Sample collection is messy, transfer is fragile, and contamination risk is underestimated until it becomes a clinical failure.
Cartridges that perform in the lab are hard to seal, mold, assemble, or scale without an early DFM commitment.
Detection performance depends on thermal, optical, electrical, and fluidic stability that keeps shifting through the build process.
Regulatory, usability, and manufacturing decisions that arrive after design freeze are expensive to reverse.
User workflows introduce contamination and error risk that no assay improvement can fix after launch.
Pilot builds expose architecture problems that cost multiples more to correct than they would at system definition.
Inertia solves the system-level productization problem around the diagnostic technology, reconciling biology, hardware, firmware, usability, regulatory intent, and manufacturability before design freeze.
Develop in vitro diagnostic medical devices with an integrated development process.
We have spent more than two decades helping diagnostic medical device programs move from working science to manufacturable, deployable products.
View more In Vitro Diagnostics products developed by Inertia
Diagnostic technologies we help bring to market
We work across diagnostic modalities where the challenge is not just detection but integration: turning assay-driven technology into a robust product, with instrument, cartridge, workflow, and a manufacturing path that holds together.
Molecular diagnostics
PCR, qPCR, isothermal amplification, NAAT, pathogen identification, AMR detection, nucleic-acid extraction.
Optical & fluorescence
Fluorescence readers, colorimetric instruments, spectroscopy systems, optical assay readers, imaging-based diagnostics.
Electrochemical diagnostics
Potentiostat-based readers, biosensor analyzers, disposable electrode cartridges, biomarker detection platforms.
Immunoassay & lateral flow
Lateral flow readers, quantitative immunoassay readers, multiplex platforms, cartridge-based immunoassays.
Microfluidic & cartridge
Lab-on-chip devices, sample-to-answer cartridges, disposable fluidic consumables, integrated sample-prep-plus-detection systems.
Lab automation & instruments
Automated sample prep, liquid handling, compact analyzers, cartridge handling, benchtop diagnostic instruments.
Areas where Inertia can help with your IVD Product Development journey
From working assay to IVD manufacturing transfer and scale
The chemistry usually works. The program stalls where the assay meets an instrument, a regulator, a user, and a production line. We carry one connected path through all four stages of IVD development, using our core team and trusted specialists where deeper assay, clinical, or regulatory expertise is required.
Feasibility & integration
Confirm the chemistry, sample path, and detection approach can survive a real instrument and a real user, not just a trained hand at the bench.
System design & verification
Develop instrument, fluidics, detection, and software as one system, verified against design controls and a risk file.
Regulatory & quality
Build the evidence and documentation a submission needs, generated as the work happens under an ISO 13485 quality system.
Transfer & scale
Move the verified design into controlled, repeatable production, so the design that passed is the design that ships.
How the decisions connect early in IVD development
Biology, hardware, regulatory intent, usability, and manufacturability rarely resolve in sequence. They converge at the first decisions, and those decisions cast long shadows all the way to launch.
The six decisions below, from assay to manufacturability, converge into one verified design, and the earlier they connect, the cheaper every later change becomes.
How six decisions converge into one verified design
- Intended use & clinical claims
- Mechanical & electromechanical systems
- Software & firmware
- Usability & human factors
- Regulatory & quality
- Manufacturability & supply
Six decisions, made in parallel
- Intended use & clinical claims
- Mechanical & electromechanical systems
- Software & firmware
- Usability & human factors
- Regulatory & quality
- Manufacturability & supply
Converging at design freeze into
One verified design
verification · transfer · launch
The diagram traces each decision from its earliest form to design freeze, where they resolve into one verified design that carries into verification, transfer, and launch. The gold path is manufacturability, the decision most often deferred and the most expensive to unwind late.
How we develop IVD instruments and systems
Three phases: design controls from day one, assay-and-instrument integration, and manufacturing transfer and scale.
Feel a diagnostic decision starting to lock in? Let's pressure-test what has to hold up next.
Start where the risk is highest
Different buyers need different entry points, from an IVD architecture sprint to a full diagnostic instrument development program.
Diagnostic instrument development program
You need instrument, cartridge, sample-prep, and verification decisions to hold together as working science becomes a built, verified instrument.
OEM opportunity & readiness sprint
You are weighing a next-generation instrument or a line you own, and need a clear read on opportunity, complexity, and the path to build it.
IVD architecture sprint
You have promising science, a prototype, or a platform and need to clarify architecture, workflow, and roadmap before committing major engineering spend.
Design transfer & pilot-build readiness audit
You need an independent view of technical readiness, architecture risk, documentation gaps, or transfer readiness before the next round.
The standards shape the work from the start
IVD development requires quality, risk, usability, design controls, and manufacturing considerations to be built into the program from the beginning. These standards guide how requirements are defined, decisions are documented, risks are managed, and evidence is generated throughout development.
For IVD programs, this framework extends into analytical performance and verification planning. Precision, linearity, interference, detection capability, and method comparison are considered as part of the development and evidence strategy rather than added at the end.
We develop with the intended regulatory pathway in view, including FDA, Health Canada, and EU IVDR requirements, working with specialist regulatory partners where formal submissions or regulatory strategy are required.
Built for the hard middle of IVD product development
The hard middle is where an IVD program stops being separate workstreams and has to become one product. Assay, instrument, cartridge, evidence, and manufacturing decisions all start affecting each other.
Integrated from strategy to manufacturing
We connect product definition, system architecture, engineering, DFM, and pilot manufacturing instead of handing off between disconnected specialists.
Strongest where others are weakest
Too technical for a design firm, too uncertain for a contract manufacturer, too execution-heavy for a strategy consultant. That gap is where we are most useful.
We design knowing products must be built
Our microfactory means we live with the consequences of design decisions.
Experience across complex regulated hardware
Biomarker detection, point-of-care molecular diagnostics, and pilot manufacturing of complex electromechanical systems.
Built for the hard middle means built for the line
From prototyping and DFM to pilot builds, transfer, and scale, the same team carries your product into manufacturing.
Which stage are you in your IVD product development process?
However your program comes to us, there's a clear first move. Find the one that sounds like you.
Promising science. Not yet a product
Move from assay or prototype to an architecture that can survive development, verification, and pilot build.
Next-generation instrument or adjacent product
Develop without pulling your core team away from the roadmap.
Turn market access into proprietary products
Move from distribution to ownership.
De-risk the architecture before more capital is deployed
Independent technical and manufacturing readiness review.
IVD development questions teams ask before engaging
Do you develop the instrument and the cartridge, or only one?
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Both, and the interface between them. An IVD works as one system, so we develop the instrument, the cartridge or consumable, the fluidics, and the sample-to-answer workflow together, with integration planned rather than discovered. If a program starts with only one element, we still design it in the context of the whole product.
Do you do assay development?
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No. Inertia does not do wet-lab assay discovery or assay chemistry. We are an IVD product development partner: we take a working assay and build the system around it, the instrument, cartridge, fluidics, workflow, evidence, and manufacturing path, and we partner with specialists for assay chemistry and analytical validation. If your assay works on the bench, that is where we start.
Do you support FDA and IVDR submissions?
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We build submission readiness into the program and coordinate trusted regulatory specialists for FDA, Health Canada, and EU IVDR. Because the FDA and IVDR pathways diverge, we set the regulatory strategy early so the design and evidence serve both and the work is not duplicated late. Clearance and approval decisions rest with the relevant authorities.
How do you handle analytical and design-control evidence?
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Design-control evidence is generated as the work happens under ISO 13485: design inputs and outputs, requirements traceability, risk management under ISO 14971, verification and validation planning, and acceptance criteria, captured in the DHF, DMR, and DHR. On the analytical side, we design the instrument and cartridge to meet the performance targets that matter, precision, linearity, interference, and detection capability, and we plan verification around them, working with analytical-validation specialists to run and substantiate the studies. The evidence is planned from the start, so performance claims hold up when a reviewer tests them.
Can you take a diagnostic to manufacturing, or only design it?
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Both. As a manufacturer with our own microfactory, we carry the verified design through pilot builds, transfer, and scaled production under one ISO 13485 quality system, so manufacturing is something we carry the program toward rather than hand off at the end.
When should we involve Inertia?
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Before architecture lock, design freeze, verification planning, or design transfer, and ideally once the assay performs on the bench and is ready to become a product. Earlier is better, while the decisions are still flexible and the cost of getting them right is low.
What is IVD development?
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IVD development is the work of turning a working diagnostic assay into a manufacturable in-vitro diagnostic product: designing the instrument and cartridge, integrating the sample-to-answer workflow, building the design-control and analytical evidence, and transferring a verified design into production. It is distinct from assay development, which is the wet-lab science IVD development is built around.
Do you handle IVD manufacturing?
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Yes, IVD manufacturing runs in-house. As a manufacturer with our own microfactory, we carry the verified design through pilot builds, transfer, and scaled production under one ISO 13485 quality system, so the design that passed verification is the design that ships.
When decisions start to lock in
Every program reaches a stretch where choices around architecture, manufacturability, regulatory path, and system integration start to carry serious consequences.
Let's talk about what has to hold up next.