A design file can carry geometry, artwork, notes, and the revision that controls the product. It still may not say how a particular workshop will make the object.
That second set of decisions is easy to hide in the same upload: a slice profile, a machine preset, a needle sequence, a cut order, or a finish step saved beside the design. Those choices can be useful. They are not the same kind of information as the product definition, and they do not automatically travel as requirements.
A manufacturing plan describes the making
ISO/ASTM 52900:2021 is a vocabulary for additive manufacturing. It defines a manufacturing plan as a document that sets out the specific manufacturing practices, technical resources, and sequence of activities for producing a particular product, including any specified acceptance criteria at each stage.
For additive manufacturing, the same definition says a plan typically includes process parameters, preparation and post-processing operations, and the relevant verification methods. A note in the vocabulary says manufacturing plans are typically required under a quality management system such as ISO 9001. That note describes a typical context. It does not by itself require an independent workshop to hold an ISO 9001 certificate.
The vocabulary also separates three related ideas:
Process parameters are the operating parameters and system settings used during a build cycle.
System set-up is the configuration of the additive manufacturing system for a build cycle.
A process chain is the sequence of operations the part needs in order to reach the desired function and properties.
These terms are defined for additive manufacturing. They are not universal settings for other methods, and this article does not supply values for them. They show the kind of decision a plan holds: how this system is configured, which settings are used for this build, and which later operations are part of the sequence.
A work instruction can be the short form
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ISO 9000:2026 defines a work instruction as a detailed description of how to perform tasks. The examples include written descriptions, flow charts, templates, models, technical notes, pictures, checklists, and combinations of those. The vocabulary says a work instruction describes the materials, equipment, and documented information to be used. When it is relevant, the instruction includes acceptance criteria.
A one-page note can be a work instruction. A longer controlled plan can be a work instruction. The test is whether a maker can see the task, the inputs, and the check that matters. The test is not the document's title.
Process requirements can be separate from the geometry
ISO 16792:2021 treats process and finish requirements as related data in a product definition data set. That related data has to be inside the data set or referenced by it. Data that is not inside the data set may be revised independently.
So a process note is allowed to live with the design. It is also allowed to live in a referenced document that can change without silently changing the geometry. What the handoff needs is a clear statement of which document is which.
If the slice profile, tool library, or finish recipe is revised, the product geometry may be unchanged. If the geometry revision changes, the old process notes may no longer apply. Independent revision is useful only when the link between the two is visible.
Who decides what
The creator defines the product requirement: the controlling file, the critical features, the material constraints that are actually known, and the acceptance need from the design side.
The maker assesses and controls the physical process. System settings, setup, and the sequence that depends on a machine, material, consumable, and software version are maker decisions unless a validated instruction has already been agreed for that exact condition.
A creator can share a suggested profile as information. Label it as a suggestion. Do not label an unvalidated machine preset as a product requirement.
A short workflow
Step 1: write the product requirement
Name the controlling design revision and the features or appearance that define the product.
Step 2: give the process its own place
Put practices, resources, sequence, and any agreed checks in a plan or work instruction. Reference it from the design package if the two travel together.
Step 3: mark what is machine-dependent
Settings that depend on the machine, material, consumable, software, and environment stay with the maker's validated method. Do not copy them from another workshop as if they were universal.
Step 4: agree the checks that are actually specified
Include acceptance criteria when the job has them. Do not invent a numerical tolerance in order to make the plan look complete.
Step 5: revise the document that changed
A design change updates the design revision. A process change updates the plan or instruction. Say which one moved.
Quality check
The design revision and the process instruction can be told apart.
Process settings are tied to a stated machine, material, and software context, or they are left for the maker to determine.
Suggested presets are not written as if they were product requirements.
Acceptance criteria are included only where they have been specified.
A change to one document does not silently replace the other.
Goodiee's view
The design file should stay the place for product intent. The manufacturing plan, or a shorter work instruction, should stay the place for how a particular process will make that product. Mixing them without a label forces the next maker to guess which lines are the product and which lines are one workshop's setup.
Limits and counter-case
Some controlled workflows keep process notes inside the same data set as the geometry. ISO 16792 allows related process and finish requirements to be integral. The problem is an unlabeled mix, not the mere fact that one packet holds both. A very small job may need only a short note of method, material, and check. This article does not set machine parameters, and the additive manufacturing definitions do not extend themselves to every other process.
What varies
The plan changes with the production method, machine, material, consumable, software version, quantity, post-processing, and the acceptance criteria that were actually specified. A setting that is valid for one combination can be wrong for another.
Next action
Look at the production method that will make the product, then keep that method's settings with the maker who runs it.
Evidence
ISO/ASTM 52900:2021 defines a manufacturing plan as a document of the specific manufacturing practices, technical resources, and activity sequence for a particular product, including any specified acceptance criteria at each stage. For additive manufacturing it typically includes process parameters, preparation and post-processing, and relevant verification methods.[1]
ISO/ASTM 52900:2021 defines process parameters as the operating parameters and system settings used during a build cycle, system set-up as the configuration of the additive manufacturing system for a build cycle, and a process chain as the sequence of operations needed for the part to achieve the desired functionality and properties.[1]
ISO 9000:2026 defines a work instruction as a detailed description of how to perform tasks, and notes that it describes the materials, equipment, and documented information to be used, including acceptance criteria when relevant.[2]
ISO 16792:2021 includes process and finish requirements among related data that must be integral to, or referenced by, the product definition data set, and notes that data which is not integral may be revised independently.[3]
Goodiee’s view
Keep product intent in the design file. Keep the practices, resources, sequence, and specified checks for a particular process in a manufacturing plan or a shorter work instruction. An unlabeled mix forces the next maker to guess which lines are the product and which lines are one workshop's setup.
Limits and counter-case
A controlled workflow may keep process notes inside the same data set as the geometry. ISO 16792 allows that when the relationship is clear. A very small job may need only a short note. This article does not set machine parameters. The additive manufacturing definitions do not automatically apply to every other process, and a vocabulary note about ISO 9001 is not a certification requirement.
What varies
The plan depends on the production method, machine, material, consumable, software version, quantity, post-processing, and the acceptance criteria that were actually specified. A setting that is valid for one combination can be wrong for another.
Sources & verification
Each numbered link in the evidence section maps to a source below.
