What Is Kitting — and Why More Manufacturers Are Outsourcing It
Quick Answer
Kitting is the process of pre-assembling individual components into ready-to-use sets that move through production or ship to customers as a single unit. It reduces assembly time, minimizes picking errors, and simplifies inventory management — but it consumes labor and floor space that many manufacturers would rather direct elsewhere. Outsourcing kitting to a third-party provider is increasingly common because the economics often favor it, especially as product lines grow more complex and quality requirements increase.
In this guide: What kitting involves, why in-house kitting costs more than most facilities expect, what to look for in a kitting partner, and when outsourcing makes financial sense.
At some point, almost every manufacturer hits the same wall. The product line is growing, customer requirements are getting more specific, and somewhere on the floor there's a team spending real hours pulling individual components, bagging them, labeling them, and boxing them up — work that keeps production moving but doesn't exactly require your most skilled people to do it.
That's kitting in a nutshell. And more manufacturers are deciding it doesn't belong in-house.
What Kitting Actually Is
Kitting is the process of grouping individual components, parts, or products together into a single, ready-to-use package. The kit might be something that goes directly to an end customer — a procedure tray, a product bundle, or a field service kit. Or it might be an internal supply kit that feeds directly into your assembly or production process, so operators aren't hunting for parts. ESD-safe kitting trays are a common example — multi-cavity trays that keep components organized, protected, and ready to hand off to the line.
Done well, kitting eliminates pick errors, reduces assembly time, simplifies inventory management, and puts a professional presentation on what goes out your door. Done poorly — or squeezed into a production floor that doesn't have the space or bandwidth for it — it creates bottlenecks and quality headaches.
The scope can range from simple to genuinely complex. A simple kit might be a handful of components heat-sealed into a static shielding bag with a label. A complex kit might involve custom die-cut box inserts, specific component placement requirements, multi-language labeling, serialization, and lot traceability documentation — all of it needing to be executed consistently, at volume, under quality controls. For electronics and medical device manufacturers, ESD-safe component storage and packaging is often a non-negotiable part of that equation.
Why the In-House Argument Usually Loses
The instinct to keep kitting in-house makes sense on paper. You control the process, you know your components, you don't have to hand anything off. But the real-world math tends to tell a different story.
Labor is the obvious one. Kitting is detail-oriented, repetitive work. It needs trained people who are paying attention, working from documented procedures, and operating in an environment that supports quality — not being squeezed onto the edge of a production floor between other tasks. When you factor in the actual loaded cost of that labor versus what you'd pay a kitting partner, the numbers usually shift quickly.
Space is the second one. Kitting requires staging area, packaging materials inventory, finished goods storage, and often climate or cleanliness controls if your products require them. That footprint has a cost whether you're counting it or not.
Then there's the quality piece. If your products go into medical devices, pharmaceutical applications, or regulated industries, your kitting operation isn't exempt from your quality management system. It needs procedures, training records, inspection steps, and traceability. Building that infrastructure internally isn't impossible, but it's not trivial either — and it has to be maintained. See our Medical Device Manufacturing Compliance resource for more on what that looks like in practice.
What to Look for in a Kitting Partner
Not every contract kitting operation is built the same way. For manufacturers in regulated industries, the baseline requirements are higher than a typical fulfillment warehouse can meet. A few things worth asking about:
Quality certifications. For medical device or pharmaceutical kitting, ISO 13485 certification is a meaningful signal. It means the operation has been audited against the quality management standard specific to medical devices — documentation, traceability, process controls, and corrective action systems are all part of it. ISO 9001 is the broader quality management baseline and matters for other regulated industries. Our ESD Program Essentials hub covers how quality controls extend into ESD-sensitive environments.
Packaging capabilities. A good kitting partner handles more than just putting things in a box. Blister packaging, clamshell packaging, heat seal bags, custom inserts, and specialty labeling all require specific equipment and expertise. Browse our Material Handling, Packaging & Shipping collection to see the types of packaging solutions used in professional kitting operations. If your kitting needs are going to evolve, it helps to work with a partner who already has those capabilities rather than outgrowing them.
Liquid filling and chemical repackaging. If any of your kits include liquids, chemicals, or cleaning agents, volumetric filling accuracy matters. Not every kitting operation is set up for this — it requires the right equipment and, in many cases, specific handling protocols.
Custom labeling and traceability. Lot numbers, expiration dates, serialization, regulatory language — if your products require any of these on the label or the package, confirm the kitting partner has the capability and the quality controls to do it consistently. Products like ESD warning labels are a good example of the kind of compliance labeling that needs to be applied accurately and consistently at scale.
Where MTE Fits In
Our value-add services were built specifically for manufacturers in industries where the quality bar is high and the margin for error is low. We handle kitting and assembly across a range of complexities — from straightforward component bagging to multi-piece kits with custom packaging, inserts, and labeling. We also do co-packing, custom labeling, heat seal and heat shrink packaging, blister packaging, clamshell packaging, and chemical repackaging with volumetric filling equipment for liquid products.
All of it operates under our ISO 13485:2016 and ISO 9001:2015 certified quality management system — the same certifications that cover our distribution and warehousing operations. That matters for medical device and ECM customers who need their supply chain partners to live inside a real quality system, not just gesture toward one.
We also offer a cloud-based VMI (Vendor Managed Inventory) program that connects directly to your supply chain — so the products feeding your kits, your line, or your customers are tracked and replenished without you having to manage it manually.
If your team is spending time on kitting that could be better spent elsewhere, or if you're looking at a new product launch that's going to require packaging you don't have infrastructure for, it's worth a conversation. Reach out to us here and we can talk through what makes sense for your situation.
Frequently Asked Questions
What is kitting in manufacturing?
Kitting in manufacturing is the process of grouping individual components, parts, or products into a single ready-to-use package. Kits may be internal — feeding directly into an assembly or production line so operators aren't hunting for parts — or external, shipped directly to end customers as a bundled product or field service kit. Done well, kitting reduces pick errors, shortens assembly time, simplifies inventory management, and improves the consistency of what leaves the facility.
Why do manufacturers outsource kitting?
Manufacturers outsource kitting primarily because the true cost of in-house kitting — labor, floor space, packaging materials inventory, quality system overhead, and management time — typically exceeds what a specialized kitting partner charges. Outsourcing also allows manufacturers to scale kitting volume up or down without adding headcount or infrastructure, and to access packaging capabilities (blister packaging, heat seal, custom labeling, liquid filling) that would require significant capital investment to build internally.
What certifications should a kitting partner have for medical device manufacturing?
For medical device kitting, ISO 13485:2016 certification is the most meaningful credential. It confirms the kitting operation has been audited against the quality management standard specific to medical devices, including documentation controls, traceability, process validation, and corrective action systems. ISO 9001:2015 is the broader quality management baseline and is relevant for other regulated industries. Facilities handling ESD-sensitive components should also have documented ESD control procedures as part of their quality system.
What is the difference between kitting and assembly?
Kitting involves grouping and packaging components together without permanently joining them — the components remain individual parts presented as a ready-to-use set. Assembly involves physically joining or building components into a finished or semi-finished product. In practice, many contract kitting operations also perform light assembly tasks such as labeling, bagging, inserting documentation, and applying closures as part of the kitting process.
What packaging types are used in professional kitting operations?
Professional kitting operations typically support a range of packaging formats including heat seal bags, static shielding bags, blister packaging, clamshell packaging, heat shrink packaging, custom die-cut box inserts, and specialty labeling. For ESD-sensitive components, ESD-safe kitting trays and static shielding packaging are standard. Liquid or chemical kitting may require volumetric filling equipment and specific handling protocols depending on the product.
How does kitting reduce manufacturing costs?
Kitting reduces manufacturing costs by eliminating the time operators spend locating and pulling individual components during assembly, reducing pick errors that cause rework or scrap, simplifying inventory management by consolidating multiple SKUs into a single kit unit, and improving line throughput by ensuring everything needed for a build step is available at the point of use. When outsourced, kitting also converts a fixed internal labor and space cost into a variable cost that scales with production volume.
