Balloon the requirements that your inspection or first article inspection (FAI) process must account for and trace to verification evidence. Dimensions, geometric controls, and requirement-bearing notes are common examples. Do not treat every visible number as a separate acceptance characteristic: reference information, governing tolerance rules, datums, patterns, and process requirements need context. The customer, contract, and quality management system (QMS) procedure determine the final scope.

Ask three separate questions

“Should this get a balloon?” often combines three decisions that are easier to answer separately:

1. Is it part of the design definition? Does it establish a product requirement or govern how another requirement is interpreted?
2. Is it accountable in this inspection? Does the current inspection or FAI process require it to be verified or otherwise recorded?
3. Where should the evidence live? Is a separate characteristic ID useful, or is the requirement grouped with another characteristic or documented in a certificate/process record?

This prevents a false choice between “balloon everything” and “ignore anything that is not a dimension.” Accountability can exist without a numeric measurement row.

Use an accountability matrix

The table is a starting point, not a substitute for a customer-specific inspection plan. “Usually” describes common practice; your governing requirements may differ.

Distinctions that prevent bad ballooning

Requirement vs. governing rule

A title-block tolerance rule can determine the allowed limits for many dimensions. It is a governing rule; the length or hole size it governs is the characteristic. Do not duplicate the title-block rule mechanically as a separate report row for every dimension. Record which rule was applied when that information helps another reviewer reproduce the interpretation.

Measured feature vs. datum reference

A datum feature establishes a reference for evaluating certain geometric controls. Its symbol is important context, but it is not automatically an independent characteristic to measure by itself. Follow the applicable inspection method and preserve the datum sequence when reporting a geometric result.

Quantity vs. requirement

“4X Ø8” says both how many features exist and what size is required. The team may create one ID with four results or a structured group of linked IDs. Do not lose the quantity while normalizing the text.

Measured vs. attribute or certificate evidence

Some requirements produce a measured value. Others are verified by appearance, documentation, or process records. A dimensional spreadsheet is not always the right place for every accountable item.

A five-question decision path

1. Does this item define a product requirement or a governing rule?
2. Is it within the scope of this inspection, FAI, or customer submission?
3. What evidence will demonstrate that the requirement was addressed?
4. Does the evidence need a unique characteristic ID to remain traceable?
5. If it does not need its own row, where will the evidence be recorded?

If any answer is unclear, resolve it with the responsible quality engineer or customer before finalizing the drawing. Software can suggest a note or dimension, but it cannot determine which customer requirement governs your process. The BalloonForge review workflow lets the reviewer correct or reject candidates and add missed items; the reviewer still owns the scope decision.

Worked example: four-hole pattern

In the synthetic plate drawing, the callout “4X Ø8.0 ±0.1 THRU” sits beside a position control tied to datum references. A useful inspection plan preserves at least four things: the quantity, the size requirement, the geometric control and its datum context, and how the four locations will be evaluated. The report can group or split these into records, but it should make clear which result belongs to which feature and control.

Standards and customer scope

AS9102 addresses how a first article inspection (FAI) is performed and documented; it should not be reduced to a one-line rule about whether a shop must draw circles around every feature. IAQG publishes Rev C forms and supporting material, while a customer, contract, or internal quality procedure may add specific documentation requirements.

For geometric dimensioning and tolerancing, use the edition of ASME Y14.5 or other standard specified by the drawing or contract. The ASME Y14.5 overview describes the standard’s role in stating and interpreting GD&T; it does not replace the licensed standard or a trained interpretation.

Frequently asked questions

Should every dimension have a balloon?

Not as a universal rule. Identify the requirements that the inspection process must account for, then apply the customer and QMS procedure.

Do reference dimensions get measured?

They are generally informational, not independent acceptance limits. If a contract or internal procedure requires special treatment, document the reason and follow it.

Do basic dimensions have their own tolerance?

A basic dimension is theoretically exact; a related geometric control supplies the tolerance context. Do not convert it into an ordinary plus/minus limit unless the source and governing standard support that interpretation.

Do notes belong in a dimensional report?

Some notes establish requirements, but the correct evidence may be an attribute check, certificate, or process record.

Further reading

• Step-by-step ballooning workflow
• IAQG 9102 resources