Producing a few hundred parts sounds straightforward until the economics of manufacturing enter the picture. A production run of 200, 500, or even 1,000 units can fall into an awkward middle ground: too many parts to make one at a time, but not always enough to justify the tooling, setup, and inventory commitments associated with large-scale production.
This is where manufacturers need to look beyond the unit price. The right process depends on the part’s size, geometry, material, tolerances, expected product life, and likelihood of future design changes. Low-volume manufacturing methods can provide practical ways to produce smaller quantities without treating every project like a mass-production program. NIST, for example, identifies low-volume manufacturing as an approach for producing small quantities without necessarily making the same tooling investment required for larger production runs.
1. Start With the Production Quantity
The first question is simple: how many parts are actually needed?
A few hundred units may be enough to justify a repeatable manufacturing process, but the answer is not automatically injection molding or another high-volume method. Tooling expenses, setup time, material costs, finishing, inspection, and assembly all affect the economics. For very small production runs or early-stage prototypes, options such as 3D printing Seattle can also be worth exploring before committing to dedicated tooling.
For products with relatively simple shapes and consistent requirements, thermoforming services can be worth evaluating when production quantities remain modest.
The important point is that “low volume” does not mean “low importance.” A company may need only 300 parts because the product is specialized, entering an early market, being used for a limited project, or replacing an older component.
The manufacturing strategy should reflect that demand rather than assuming every product needs the same production model.
2. Compare Tooling Costs With Expected Demand
Tooling can have a major influence on the economics of a small production run.
A process that requires expensive production molds may make sense when thousands or millions of identical parts will be manufactured. With only a few hundred units, however, the tooling cost can become a significant portion of the overall project cost.
Consider a product that requires 400 parts. If the manufacturer expects the design to remain unchanged for several years, investing in more substantial tooling may still be reasonable. But if the product is experimental or likely to be redesigned after the first production run, a lower initial investment may be more practical.
The calculation should therefore include both today’s requirements and the expected future demand.
3. Look at How the Part Is Shaped
Part geometry can eliminate some manufacturing options before cost is even considered.
Large, relatively thin plastic components can be suited to forming processes because the material begins as a sheet and is shaped over a mold. This can be useful for products such as covers, housings, trays, panels, and other components where the final shape does not require extremely intricate internal features.
Other parts may have deep cavities, fine details, complex ribs, threaded features, or tight dimensional requirements. These characteristics can make a different manufacturing process more appropriate.
The lesson is straightforward: production quantity should never be evaluated separately from part design.
4. Consider Material and Wall Thickness
Material selection becomes particularly important when only a small number of parts are required.
The material needs to satisfy the product’s functional requirements, but it also needs to work with the selected manufacturing process. Heat resistance, impact performance, flexibility, chemical exposure, appearance, and structural requirements can all influence the decision.
Wall thickness matters as well. A product with relatively uniform walls may be easier to manufacture consistently than one with dramatic changes in thickness.
Designers should also think about how the part will behave after production. A material that looks attractive on paper may not be the best choice if it creates unnecessary processing challenges or increases scrap.
5. Decide How Much Dimensional Precision Is Necessary
Not every component needs extremely tight tolerances.
A protective cover may have more flexibility in its dimensions than a component that must fit precisely with gears, bearings, electrical components, or another mechanical assembly.
This distinction matters because tighter tolerances can increase manufacturing complexity and inspection requirements.
Engineering drawings should communicate the dimensions that actually affect function rather than assigning extremely narrow tolerances everywhere. ASME’s guidance on geometric dimensioning and tolerancing emphasizes the role of GD&T in communicating design intent and achieving the required form, fit, and function.
For a small production run, unnecessary precision can increase costs without improving the finished product.
6. Think About Prototyping and Design Changes
A product that needs only a few hundred parts may still be early in its development.
For example, a company could be testing a new enclosure with its first 300 customers. Feedback from those users might lead to changes in the shape, mounting points, ventilation openings, or material.
That possibility changes the manufacturing decision.
A process that requires extensive tooling may become less attractive if the design is expected to change soon. On the other hand, if testing has already confirmed the design and future demand is predictable, a more permanent production approach may make sense.
Manufacturers should ask an important question before production begins:
Are these 300 parts the beginning of a long production cycle, or could they be the only production run?
The answer can significantly change the economics.
7. Consider Part Size and Material Usage
Part size can also affect the practical choice of manufacturing process.
A small component may be economical to produce using several different methods. A large plastic cover, enclosure, or panel can create different tooling, machine, handling, and material requirements.
Material usage should be examined alongside part dimensions. A manufacturing process that requires excessive trimming or creates significant unused material may become less attractive when multiplied across hundreds of parts.
This does not mean that material efficiency should determine the entire decision. Functional requirements, production consistency, finishing, and quality remain important. But material usage can be a meaningful part of the total cost calculation.
8. Examine Secondary Operations
The manufacturing process rarely ends when the basic part comes out of a machine.
Parts may require trimming, drilling, machining, bonding, painting, printing, assembly, or inspection before they are ready for use.
For a 300-part order, these secondary operations can represent a substantial share of the labor involved.
For example, a formed plastic enclosure might require holes for fasteners and connectors. If those holes must be created individually, the time required for that additional operation needs to be included in the project estimate.
A useful manufacturing comparison should therefore evaluate the complete workflow rather than comparing only the primary forming or molding step.
9. Compare Lead Time With Inventory Needs
Low-volume production can also change how companies think about inventory.
A business may not want thousands of finished parts sitting in storage when customer demand is uncertain. Excess inventory ties up capital and creates the possibility that a design change will make existing parts obsolete.
At the same time, producing too few parts can create delays if demand increases unexpectedly.
For a few-hundred-unit project, manufacturers should consider whether it is better to produce the entire quantity at once or divide production into smaller batches.
10. Calculate the Total Cost Per Part
The cheapest manufacturing process on a per-part basis is not necessarily the cheapest choice for a 300-unit project.
A proper comparison should consider:
- Tooling and setup costs
- Raw material
- Machine time
- Labor
- Secondary operations
- Quality inspection
- Packaging
- Shipping
- Storage
- Expected scrap
- Future tooling or design changes
Suppose Process A produces parts at a lower unit price but requires expensive tooling. Process B has a slightly higher unit price but substantially lower upfront costs. For a short production run, Process B may have the lower total project cost.
This is why manufacturers should calculate the complete cost of the production run rather than focusing on one number.
11. Consider What Happens After the First Few Hundred Parts
The first production run can provide useful information about what happens next.
If the product performs well and demand increases, the manufacturing process may eventually need to change. A method that works efficiently for 300 units may not remain the best option for 30,000.
The opposite can also happen. If demand remains low, maintaining a flexible low-volume production approach may make more sense than investing in high-volume tooling.
Manufacturing decisions should therefore leave room for the product’s expected lifecycle.
Conclusion
When a product requires only a few hundred parts, the manufacturing challenge is not simply finding a way to produce them. It is finding a process that fits the quantity, geometry, material, quality requirements, budget, timeline, and expected future demand.
Low-volume production can reward flexibility, particularly when product designs are still evolving or demand is uncertain. But that does not mean one process will always be the right answer.
The best decision comes from comparing the complete production picture, including tooling, labor, materials, secondary operations, quality requirements, and what happens after the first few hundred parts are delivered.
FAQs
Is producing a few hundred parts considered low-volume manufacturing?
In many manufacturing contexts, a few hundred units can be considered low-volume production, although there is no universal quantity threshold. The classification depends on the industry, product, process, tooling requirements, and expected demand. A production run of 500 parts may be low volume for one manufacturer but relatively substantial for another.
What manufacturing process is best for a few hundred plastic parts?
There is no single best process for every project. The right option depends on the part’s geometry, dimensions, material, tolerances, tooling requirements, and future demand. Thermoforming, CNC machining, additive manufacturing, and molding processes can all be appropriate in different low-volume production situations.
Should companies invest in permanent tooling for a small production run?
Permanent tooling may not always be necessary for a few hundred parts. If demand is uncertain or the design may change, a lower-cost tooling approach can reduce risk. If the product has stable demand and a long expected production life, investing in more durable tooling may make better economic sense.