INDUSTRY FIELD GUIDE
Bicycle manufacturing data for AI frame and size records
The Census category includes motorcycle and bicycle manufacturing.
NAICS 336991 · Motorcycle, Bicycle, and Parts Manufacturing
The Census category includes motorcycle and bicycle manufacturing. An original bicycle example can connect a frame variant with the size declaration and assembly record supplied for it. Census bicycle-manufacturing scope
Draw fictional frame silhouettes and create original size-code and component registers. Give two variants similar outer shapes with different measurement-reference labels. Ask which size declaration belongs to the selected frame. Include a shipping carton with a family label and a decal staged nearby without a recorded application. The key should preserve the application gap.
Record frame, variant, size convention, decal, application event and source view. Evaluate with a new geometry and coding scheme. Score family label used as exact size, loose decal treated as applied and two measurement conventions merged independently. A supported example should cite the executed frame-to-declaration association.
Use paper models and invented values without bicycle assembly, riding or load testing. Customer designs, licensed artwork, supplier specifications and owner histories need appropriate authority. Define the variant-association task and qualified reviewer key before a commercial proposal. Establish buyer requirements before preparing actual records or authorized capture. This exercise makes no rider-fit, braking, structural or road-use determination. A future contributor inventory tool could help identify missing unit links after development and validation.
Discuss this original manufacturing sample with Fiund
Original Fiund exercise
A decal and frame register disagree
Original paper bicycle frames have invented size codes and one geometry marker.
| Record | Source | What it records |
|---|---|---|
| 1 | Frame register | Serial F6 assigned size class M. |
| 2 | Photo | F6 stamp visible; decal reads L. |
| 3 | Geometry card | Photo lacks the reference scale required to distinguish M from L. |
Question for the model
What can be claimed about size?
Show the reference answer and checks
Records 1 and 2 establish conflicting size evidence for the same serial: registered M and printed L. Record 3 prevents adjudicating it from the silhouette. Retain both values and seek a valid measurement or corrected record rather than announcing either size as verified.
- Treating a decal as conclusive despite a conflict
- Estimating frame size from an unscaled image
Fields to preserve
- frame_serial
- Binds both records to one object
- decal_size
- Stores physical label evidence
- geometry_scale_status
- Gates independent dimensional verification
Test another case
Use a photo of another frame with a clear scale; prevent it from resolving F6 by visual similarity.
No real bicycle dimensions, rider fit advice, product standards or structural claims.
Discuss a contribution
Describe the sources you control, the task they could support and what has already been checked. Use the existing-data assessment for an archive or the collection brief for a new recording project. The contributor agreement defines Fiund’s licensing authority and compensation. A guide or fictional exercise does not establish an accepted collection or a sale.