Build to print for manufacturers. Is it right for you?

You might have heard of build-to-print manufacturing. Here’s a comprehensive guide on what it is, when to use it, and how it differs from build to spec.

What is build-to-print manufacturing?

Build-to-print manufacturing is a production model where the customer provides a complete design package, and the manufacturer builds the product exactly to those specifications.

What’s the difference between build-to-print and build-to-spec manufacturing?

Where build to print is a manufacturer producing products in exactly the way they were requested, build to spec is a manufacturer collaborating with the customer to create the best product and manufacturing process from the ground up.

Build to print vs build to spec

The key difference between build to print and build to spec manufacturing is where engineering responsibility sits. With build to print, it’s with the customer. With build to spec, it’s shared with the manufacturer.

Build to print focuses on execution. Build to spec introduces collaboration earlier in the lifecycle to improve manufacturability and reduce downstream risk.

For AIR, we find that many industrial automation projects begin as build-to-spec engagements before transitioning into repeatable build-to-print production.

Build to print vs build to spec, a summary

Quick comparison of build to print vs build to spec manufacturing

Where does responsibility sit for build to print manufacturing?

In build to print, the customer is fully responsible for the design. The manufacturer focuses solely on execution.

The customer supplies the paperwork

• Engineering drawings
• Bills of materials (BOM)
• Tolerances
• Assembly instructions
• Quality and testing requirements

The manufacturer is then responsible for building exactly what’s specified, with minimal interpretation or redesign.

A note on IP and design ownership

For the customer, sharing a complete design package means sharing proprietary IP. A credible build-to-print partner should have NDAs in place before any documentation is exchanged, clear policies on how design files are stored and who can access them, and defined processes for returning or destroying files if the relationship ends.

What’s the build-to-print manufacturing process?

For success and to reduce risk, your supplier should follow a structured workflow. With multiple facilities and teams across regions, consistency is critical.

The process typically involves several stages:

• Early-stage review of requirements and design intent
• Identification of manufacturability improvements before production
• Support during transition from prototype to scalable production
• Structured validation and testing during initial builds
• Ongoing production support to improve consistency and efficiency

At AIR, we offer a standardized project management framework that ensures every project is delivered to the same high standard — regardless of location, complexity, or scale. This allows us to scale delivery while maintaining control, quality, and predictability.

This process often follows a build-to-spec process, where a viable, successful, efficient product manufacturing process is defined first.

When should you use build-to-print manufacturing?

Build to print is most suitable for product designs that are fully mature and stable.

Build to print is typically used when:

1. The design has already been validated through prototyping
2. Engineering teams have complete documentation
3. Regulatory or certification requirements require strict adherence to drawings: In MedTech, pharma, and food manufacturing, this extends to full component traceability, version-controlled documentation, and First Article Inspection (FAI) — where IQ/OQ/PQ process validation applies, the manufacturing process itself must be formally validated, not just the finished product
4. High repeatability and consistency are more important than design iteration
5. Production volumes justify stable, fixed manufacturing processes

In these cases, build-to-print provides control, consistency, and predictability.

Are there limitations to build-to-print manufacturing?

While build-to-print is the right option in some contexts, there are issues that can slow production down:

• Incomplete documentation. Even small gaps in drawings, tolerances, or specifications can lead to delays or manufacturing inconsistencies.
• Reduced flexibility once production begins. If design improvements are identified, implementing changes can be slow and costly due to formal revision control processes.
• Inefficiencies from design problems. Build-to-print locks in the original design decisions. If bad decisions were made under prototype conditions or time pressure, these inefficiencies will slow down full-scale production.
• Limited opportunities. At AIR, we strive to improve manufacturability and optimize performance for every customer. In rigid build to print situations, however, this opportunity is limited.

Can you still evolve designs in build-to-print?

Yes, we find that most industrial automation and engineering projects evolve beyond a pure build-to-print model.

Projects often end up needing increasing levels of engineering input when:

• Components become obsolete and redesigns or substitutions are needed
• Production scales and reveals assembly or process inefficiencies
• Repeat manufacturing uncovers quality issues
• Testing requirements change after initial deployment
• Customer feedback or field performance require design updates

What does build-to-spec manufacturing enable?

Build-to-spec manufacturing allows a manufacturer to share its engineering expertise before production is set in stone.

This can lead to:

• Improved manufacturability before scaling begins
• Reduced risk for production and quality during ramp-up
• Optimized component selection and sourcing
• Improved assembly efficiency and repeatability
• Aligned testing methods with real-world operating conditions
• Lower lifecycle cost rather than just initial build cost

In industrial automation environments, these can significantly increase long-term performance and reliability.

When is build to spec the better choice?

Build-to-spec manufacturing is a good option when:

• The design is still evolving or not fully validated
• There are known gaps or uncertainties in documentation
• The product is moving from prototype to scale-up
• Manufacturing constraints need to be considered early
• Engineering resources are limited internally
• There is a need to optimize for long-term production efficiency

An early, strong collaboration between engineering and manufacturing can reduce risk, improve quality, and save costs.

Does AIR offer build to print or build to spec?

AIR supports companies with both build-to-print and build-to-spec manufacturing projects. However, most of our automation projects ultimately take a build-to-spec approach. Our core aim is always to optimize the manufacturing process and create efficiencies.

AIR’s build-to-spec process

We engage customers in a proven, 7-step process:

1. Concept & quotation

Early engagement to define requirements, assess feasibility, and shape the right solution from the outset.

2. Planning

Detailed project planning, including scope definition, timelines, resources, and risk assessment.

3. Design & development

Concept design, generate drawings, schematics, software, design specifications, and conduct simulations. Mechanical, electrical, and software design developed in parallel, with ongoing customer alignment. Design approval and release of BOMs.

4. Manufacturing & build

Procurement, manufacture of parts, kitting of sub-assemblies, machine build-out, coding, and documentation development. Power up I/O check.

5. Commissioning & FAT

Full system validation on-site through Factory Acceptance Testing, ensuring performance against agreed specifications.

6. Installation & SAT

On-site installation and Site Acceptance Testing, bringing systems into full production readiness. Customer approval.

7. Project close-out

Final validation, documentation, training, and structured review to capture learnings and drive continuous improvement.

We don’t replace the customer’s design authority, but strengthen the link between design intent and real-world manufacturing performance.

To sum up: use build to print for mature designs (but be ready to evolve)

Build-to-print manufacturing remains a widely used and effective model for stable, fully defined designs.

However, many industrial automation projects need a more collaborative build-to-spec approach:

• Introducing engineering input earlier
• Reducing production risk
• Improving long-term manufacturability.

Understanding the difference between these models helps companies choose the right approach for each stage of the product lifecycle, rather than defaulting to a one-size-fits-all manufacturing strategy.

Whether you need strict build-to-print execution, or additional engineering support for automation projects, AIR can help take your product from specification to production. Talk to us about your needs

FAQs about build-to-print manufacturing