What Should Be Considered Before Sending a Product Design to a Factory?

What information should be resolved before manufacturing begins?

At minimum, a factory needs enough information to understand: - what the product is - how it should function - what materials are intended - how it should be constructed - what dimensions and tolerances matter - what finish is required - what quality level is expected - what quantity is being produced - how the product will be packed - and what target cost the product needs to achieve

If these things are unclear, the factory will be forced to fill in the gaps.

Sometimes they will make good assumptions.

Sometimes they will not.

A visual concept is not a manufacturing brief

One of the most common mistakes in product development is assuming that a render or concept drawing contains enough information for a supplier to proceed.

It usually does not.

A factory may understand the aesthetic intent but still have no clear answer to questions like: - How thick should this component be? - What happens at this joint? - Which surface needs to be finished? - What tolerance is acceptable here? - Is this part solid, hollow, laminated, or moulded? - Does the hardware need to be concealed? - How much weight does it need to support? - Does it ship assembled or flat-packed? - What happens if the material expands or contracts?

Those are not small details.

They determine whether the product can actually be made.

Understand the factory before finalizing the design

A product should not be developed in isolation from the factory that will manufacture it.

Different factories have different strengths.

One may have excellent CNC capability.

Another may rely heavily on hand finishing.

One may have existing moulds that can be reused.

Another may require new tooling.

One may produce a particular material efficiently because it already buys it in volume.

Another may need to source it specially.

If you understand the factory’s capabilities early, the product can be designed around processes the supplier already performs reliably.

That can improve cost, quality, and speed to market.

Confirm materials and construction

Material decisions affect almost every part of the product.

They influence: - cost - weight - durability - finish - tolerances - packaging - shipping - assembly - manufacturing process - regulatory requirements

A material name alone is often not enough.

For example, “oak” could mean solid oak, oak veneer, engineered board with oak veneer, laminated oak, or a stained substitute.

Those choices can completely change the economics and construction of the product.

The material specification should be specific enough that the factory knows what is expected.

Some dimensions are aesthetic.

Others are structural.

Some determine whether two parts fit together.

Some determine whether the product fits inside packaging.

Some determine whether it complies with a standard.

The important thing is to identify which dimensions are critical.

Over-specifying tolerances can increase manufacturing cost unnecessarily.

Under-specifying them can create quality problems.

Good manufacturing documentation distinguishes between the two.

Understand target cost before production

A factory can manufacture many things.

The more important question is whether it can manufacture the product at the cost the business requires.

Target cost should influence design decisions early.

A product with too many parts, operations, finishes, suppliers, or labour-intensive details may be technically manufacturable and commercially impossible.

Before sending the design to a factory, the team should understand: - expected retail price - required margin - target factory cost - packaging allowance - freight assumptions - expected production volume

Otherwise, the team may spend weeks engineering a product that never had a viable cost structure.

Think about production volume

Manufacturing decisions change with volume.

A process that makes sense for 200 units may be inefficient at 20,000 units.

A new tool may be impossible to justify for a small test but highly economical at scale.

Manual operations may work for an initial run and become expensive as volume grows.

Factories need realistic volume expectations because those numbers influence: - process selection - tooling - material purchasing - pricing - labour - capacity planning - MOQ

Volume is not only a procurement question.

It is part of the design brief.

Consider tooling before requesting new tooling

Before creating a new mould, die, jig, or fixture, ask what the factory already has.

Existing tooling can sometimes provide most of what the product needs.

Using it may reduce: - upfront cost - development time - sampling - technical risk - production setup

New tooling should create measurable value.

If it does not materially improve function, cost, quality, differentiation, or scalability, it may not be worth the investment.

Packaging should be considered before the product is finished

Packaging is often introduced too late.

That can create expensive problems.

A product may be too large for an efficient parcel size.

A fragile element may require more protection than expected.

A component may need to become removable.

An assembled product may need to become flat-packed.

Packaging can affect: - product dimensions - construction - hardware - assembly - material selection - breakage - freight cost - fulfilment method

For e-commerce products, packaging can determine whether the product is commercially viable at all.

It should be considered before the design is locked.

Ask: - Is the product assembled at the factory? - Does the customer assemble it? - How many steps are involved? - Does it require special tools? - Can parts be assembled incorrectly? - Are fasteners visible? - Can the factory access all fastening points? - Can components be replaced if damaged?

Assembly decisions affect labour, packaging, returns, customer experience, and quality.

A product that is easy to manufacture but frustrating to assemble is not fully resolved.

Define the quality standard

“High quality” is not a specification.

Factories need clear expectations.

Quality standards can include: - acceptable surface variation - finish consistency - colour tolerance - gap tolerances - alignment - hardware performance - load requirements - scratch resistance - packaging condition - acceptable defect levels

If quality expectations are subjective, disagreements are likely.

Where possible, use measurable criteria and approved physical samples.

Identify testing requirements

Some products require formal regulatory testing.

Others need internal validation.

Testing may include: - structural load testing - stability testing - drop testing - abrasion testing - colourfastness - moisture resistance - packaging transit testing - chemical compliance - flammability - electrical certification

Testing should not be discovered immediately before launch.

If a product needs to pass a standard, that requirement should influence the design.

Make the documentation clear

A manufacturing package may include: - dimensioned drawings - CAD files - exploded views - material specifications - finish references - hardware details - BOM - assembly instructions - packaging requirements - critical tolerances - testing standards - reference images

The goal is not to create documentation for its own sake.

The goal is to reduce ambiguity.

Every unanswered question becomes a decision someone else has to make.

Do not rely on the factory to fix an unresolved design

Factories are often excellent problem solvers.

But that does not mean design teams should hand over unresolved concepts and expect the supplier to complete the product.

The factory’s incentives are not always identical to the brand’s.

A supplier may reasonably choose: - the easiest construction - the lowest-cost component - an existing standard - the process they prefer - the material they can source most easily

Those decisions may be perfectly logical from a manufacturing perspective and wrong for the customer or brand.

The stronger the brief, the less room there is for unintended interpretation.

Samples are part of the development process

Sending a design to a factory does not mean the design is finished.

The first sample is a learning tool.

It reveals things drawings cannot always predict: - proportions - comfort - stability - finish - material behaviour - assembly - visual weight - manufacturing quality

The sample should be reviewed against clear criteria.

Changes should be documented.

The next revision should answer specific problems.

Sampling works best as a controlled validation process rather than an open-ended redesign cycle.

What should be checked before sending a product design to a factory?

A useful pre-production check is:

Product

Is the form, function, and customer requirement clear?

Manufacturing

Can the nominated factory make it using its existing processes and capabilities?

Materials

Are materials, finishes, hardware, and components clearly specified?

Engineering

Are critical dimensions, tolerances, joints, and structural requirements resolved?

Cost

Does the product have a realistic target cost and margin structure?

Volume

Are expected production quantities and MOQ assumptions understood?

Tooling

Has existing tooling been reviewed before new tooling is commissioned?

Packaging

Can the product be packed and shipped economically and safely?

Assembly

Is the assembly method appropriate for the factory and customer?

Quality

Are measurable quality standards defined?

Testing

Are regulatory and performance requirements known?

Documentation

Does the factory have enough information to build the intended product without guessing?

If several of these answers are still unclear, the product may not be ready for manufacturing.

So, when is a product ready to send to a factory?

Not when the render looks finished.

Not when the design presentation has been approved.

And not simply when the CAD exists.

A product is ready when the team understands enough of the manufacturing and commercial system to have a productive conversation with the factory.

There will always be iteration.

That is normal.

But the goal is for factory collaboration to refine a viable product, not discover the fundamental requirements for the first time.

The earlier manufacturing reality enters the design process, the fewer expensive decisions have to be undone later.