A dimensional report is a formal record that documents the measured dimensions of a part or assembly and compares them to the design or specification requirements. It is commonly generated after an inspection activity and is used as objective evidence that the manufactured item meets, or does not meet, defined dimensional tolerances.
What a dimensional report typically includes
While formats vary by organization and customer, a dimensional report commonly contains:
- Part and drawing identifiers (part number, revision, drawing number)
- Inspection lot, work order, or serial number references
- List of characteristics or features to be measured (often ballooned from the drawing)
- Nominal dimension and tolerance for each characteristic
- Actual measured values from inspection equipment
- Pass/fail or in-tolerance/out-of-tolerance indication for each dimension
- Measurement method and equipment identifiers, when required
- Inspector identification and date, and sometimes approval signatures
In regulated and aerospace environments, the dimensional report may be tied to first article inspection (FAI) packages, manufacturing records, or supplier deliverables.
Operational use in manufacturing and quality systems
In industrial operations, dimensional reports are used to:
- Provide traceable evidence that critical dimensions meet design and customer requirements
- Support first article inspection and qualification builds
- Document results of in-process, final, or receiving inspection activities
- Feed nonconformance, CAPA, or MRB workflows when dimensions are out of tolerance
- Support audits and customer reviews of inspection and quality records
Digital MES, QMS, or inspection systems often generate dimensional reports automatically from captured measurement data, linking them to work orders, inspection plans, and device history or as-built records.
Relationship to standards and FAI
In aerospace, dimensional reports are often part of AS9102 first article inspection documentation. The report lists drawing characteristics, their requirements, and the measured results that demonstrate conformity. Similar reporting approaches are used in other regulated sectors, even when different standards apply.
What a dimensional report is not
- It is not the same as a full device history record or manufacturing history, which includes process steps, materials, and other data, not only dimensions.
- It is not a process capability study, although dimensional report data may be used as input to capability analysis.
- It is not limited to first articles; it can be used for routine inspection, sample inspection, or special measurement studies.
Common confusion
- Dimensional report vs. inspection report: An inspection report is a broader term that may include visual checks, functional tests, and other attributes. A dimensional report focuses specifically on measured dimensions and tolerances.
- Dimensional report vs. CMM report: A CMM report is a type of dimensional report generated from a coordinate measuring machine. Not all dimensional reports come from CMMs; they may use calipers, micrometers, optical systems, or manual gauges.