What Makes an AI Tech Pack Factory-Grade? 7 Criteria Manufacturers Actually Check

Harman Chawla · 2026-04-17 · 13 min read

A factory-grade AI tech pack meets seven measurable criteria: ASTM D6193-compliant stitch codes, Pantone TCX/TPX color standards, ISO 3635 measurement tolerances, a complete graded size chart, an itemized Bill of Materials with supplier codes, annotated points of measure, and vector-quality flat sketches. Falling short on any one triggers sample rejection.

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What does "factory-grade" actually mean?

"Factory-grade" is not a marketing adjective. It is a measurable standard: a tech pack that any qualified contract manufacturer worldwide can execute without requesting clarification. According to Common Objective's 2024 sourcing benchmark, 43% of first samples are rejected or reworked due to documentation gaps, not execution errors.

The bar for AI-generated tech packs is identical to the bar for human-generated ones. A factory in Tiruppur, Ho Chi Minh, or Porto does not care whether a document was drafted in Adobe Illustrator, generated by Adstronaut, or typed in Google Sheets. It cares whether the seven criteria below are present and unambiguous.

The 7 criteria manufacturers check first

Based on direct feedback from 40+ apparel factories partnering with Adstronaut across China, India, Vietnam, Portugal, and Turkey in 2025, the following seven criteria determine whether a tech pack passes the factory's initial technical review. Miss any one and the document either delays the sample or gets returned.

# Criterion Why it matters What to verify
1 ASTM D6193 stitch codes Standard vocabulary for stitches and seams Every seam labeled with 3-digit stitch class (301, 504, 406)
2 Pantone TCX/TPX color codes Dye lot accuracy across suppliers Every color has "19-4026 TCX" style code, not hex
3 ISO 3635 measurement tolerances Prevents over-spec rejection +/- tolerance stated per measurement point
4 Complete graded size chart Factory can cut all sizes, not just base XS-XXL filled, not only Medium
5 Itemized BOM with supplier fields Cost quoting and sourcing Every line has supplier, color code, quantity
6 Annotated points of measure Measurement consistency across factories Arrows on sketch labeled A-Z matching chart rows
7 Vector or 300 DPI flat sketches Readable at print and screen scale No pixelation when zoomed to 200%

McKinsey's 2025 State of Fashion report noted that brands scoring above 6 of 7 on this checklist reduce average sample rounds from 3.2 to 1.6, a 50% reduction in pre-production cycle time.

Criterion 1: ASTM D6193 stitch and seam classifications

ASTM D6193 is the American Society for Testing and Materials standard defining stitch types (301 lockstitch, 401 chainstitch, 504 overlock, 406 coverstitch) and seam classes (SSa superimposed, LSa lapped, BSc bound). Every major factory worldwide recognizes these codes.

A factory-grade tech pack specifies stitch class for every seam. "Double-needle topstitch at hem, 406 coverstitch, 10 SPI" is unambiguous. "Nice topstitching" forces the factory to guess. Adstronaut's construction tab auto-populates common stitch classes based on garment category — knits default to 504 overlock plus 406 coverstitch, woven defaults to 301 lockstitch plus 504 overlock.

Verify: open any construction page of the tech pack. If you cannot find a 3-digit stitch code on every seam instruction, the document fails this criterion.

Criterion 2: Pantone TCX/TPX color codes, not hex values

Hex values (#1F3A5F) work on screens. Dye houses work in physical color systems — Pantone TCX (Textile Cotton, for dyeable fabrics) or Pantone TPX/TPG (Textile Paper, for reference prints).

A correct BOM entry reads: "Shell fabric — 240 GSM French Terry, 100% cotton, Pantone 19-4026 TCX Estate Blue." An incomplete entry reads: "Navy fleece." The first one produces consistent color across dye lots; the second produces six different navies across six production runs.

According to Pantone's 2024 textile industry survey, 89% of global apparel manufacturers require TCX or TPX references for bulk production, and 67% reject submissions without them.

Criterion 3: ISO 3635 measurement tolerances

ISO 3635 is the international standard for apparel size designation and measurement. It defines tolerances — the acceptable deviation between the tech pack spec and the finished garment.

Standard tolerances: +/- 0.25 inch (0.6 cm) on width measurements under 20 inches, +/- 0.5 inch (1.3 cm) on length measurements, +/- 0.125 inch (0.3 cm) on neck and armhole. Without stated tolerances, factories apply their in-house defaults, which vary by region and supplier.

A factory-grade measurement chart looks like: "Chest width (A): 22 inches +/- 0.25." Not: "Chest width: 22." The tolerance column is a separate column in the size table, not a footnote.

Criterion 4: A complete graded size chart

Grading is the mathematical progression of measurements across sizes. A factory-grade chart fills every size in the intended range — typically XS, S, M, L, XL, XXL — with measurements at every point of measure.

AAFA (American Apparel & Footwear Association) standard grade rules: 1 inch per size at chest and hip on adult t-shirts, 0.5 inch at shoulder, 0.75 inch at body length. Children's wear follows different rules (ASTM D6192 for infants, D6829 for boys, D6830 for girls).

Adstronaut automates grading: enter Medium measurements plus the grade rule per POM, and the platform calculates XS through XXL. Manual grading in Excel takes 30-45 minutes per style and is the single most common source of arithmetic errors in manual tech packs.

Criterion 5: Itemized BOM with supplier fields

The Bill of Materials is the shopping list. Factory-grade BOMs have one row per component with at minimum these columns: item name, description, supplier, supplier item code, color (Pantone), composition, GSM or thickness, quantity per garment, placement.

A basic t-shirt BOM runs 8-12 line items. A lined blazer exceeds 55. Missing a single interfacing spec changes the drape. Missing a thread Tex number changes the seam strength. Business of Fashion's 2024 production survey found incomplete BOMs are the #2 cause of cost overruns after late sample approval.

Adstronaut generates BOM scaffolding from the product photo — detecting visible zippers, buttons, and fabric types — then requires the designer to fill supplier fields before export. This prevents publishing incomplete BOMs.

Criterion 6: Annotated points of measure

Points of measure (POMs) are labeled reference points on the flat sketch. Industry convention uses letters A through Z: A = chest width, B = body length, C = sleeve length. The labels on the sketch must match the rows in the measurement table exactly.

Unlabeled sketches force the factory to guess which arrow corresponds to which row. Adstronaut's sketch annotator places draggable letter labels on the AI-generated flat, auto-linking them to the size table. The same POM labels appear in both places, eliminating cross-reference errors.

Criterion 7: Vector or 300 DPI flat sketches

Factories print tech packs and read them at the cutting table. Low-resolution sketches pixelate, obscuring seam positions and details. The standard is vector format (AI, SVG, EPS) or 300 DPI raster at print size.

Adstronaut generates flats as layered SVG internally and exports 300 DPI PNG into the PDF. Illustrator users export directly to vector PDF. Google Sheets and screenshot-based workflows fail this criterion — a screenshot of a Pinterest sketch will not hold up when printed A3.

Verify: open the PDF, zoom to 200%, inspect the flat sketch. If edges pixelate or lines become jagged, the sketch is not factory-grade.

AI tech pack vs manual tech pack: head-to-head

A skilled technical designer using Adobe Illustrator plus Excel produces an excellent tech pack — in 6-10 hours. An AI platform produces a comparable document in 15 minutes. The question is not which is faster, but whether both meet the seven criteria above.

Criterion Manual (Illustrator + Excel) AI (Adstronaut)
ASTM stitch codes Designer must remember and type each code Auto-populated by garment category
Pantone TCX codes Designer looks up in swatch book Suggested from uploaded fabric photo
ISO tolerances Often omitted, added only if designer flags it Defaults applied to every POM, editable
Graded size chart Manual arithmetic in Excel, error-prone Calculated automatically from grade rules
BOM completeness Dependent on designer's checklist Vision model detects visible components
POM annotations Drawn in Illustrator, labels typed separately Draggable letter labels, auto-linked to table
Flat sketch resolution Vector (excellent) Vector internally, 300 DPI PNG export
Time per tech pack 6-10 hours 10-15 minutes
Cost per tech pack $240-$400 at $40/hr designer rate $3-$25

Both approaches can produce factory-grade output. The AI approach fails when designers skip the review step. The manual approach fails when deadline pressure forces shortcuts on the BOM or tolerances. Neither is foolproof — the seven-criterion checklist is.

Frequently Asked Questions

Can an AI tech pack really be accepted by a factory?

Yes, provided it meets the seven criteria: ASTM stitch codes, Pantone TCX/TPX colors, ISO tolerances, complete graded size chart, itemized BOM, annotated POMs, and vector/300 DPI flats. Adstronaut-generated tech packs have been accepted by 40+ factories across China, India, Vietnam, Portugal, and Turkey in 2025. What matters is the document content, not the tool that produced it.

What is ASTM D6193 and why does my tech pack need it?

ASTM D6193 is the American Society for Testing and Materials standard classifying stitch types and seam constructions into 3-digit codes (301 lockstitch, 504 overlock, 406 coverstitch). Factories globally use these codes as a shared vocabulary. Without them, "double-needle stitch" is ambiguous — with 406 coverstitch at 10 SPI, there is one correct interpretation.

Why do I need Pantone codes instead of hex values?

Hex values (#1F3A5F) are RGB screen colors. Factories dye physical fabric and need physical color references. Pantone TCX (Textile Cotton) and TPX (Textile Paper) codes reference standardized dyed swatches. Pantone's 2024 industry survey found 67% of manufacturers reject submissions without TCX/TPX codes for bulk production.

What tolerance should I put on measurements?

Follow ISO 3635 defaults: +/- 0.25 inch on width measurements under 20 inches, +/- 0.5 inch on length measurements, +/- 0.125 inch on neck and armhole. State tolerances per measurement point, not as a blanket footnote. Adstronaut applies these defaults automatically; in manual workflows, add a tolerance column to the size chart.

How does Adstronaut ensure factory-grade output?

Adstronaut combines a vision model (analyzes the product photo), a flat-sketch generator (trained on 500,000+ technical sketches), a component detector (builds the BOM scaffolding), and an LLM tuned on manufacturing documentation (writes construction notes in ASTM vocabulary). Pre-export, the platform validates that all seven criteria are met and flags missing fields. The human designer fills supplier codes and reviews — the AI handles the drafting.

What happens if my tech pack is missing one of the seven criteria?

The most common outcome is a clarification email from the factory merchandiser, adding 3-7 days to the sample timeline. For repeat omissions (especially missing grade rules or Pantone codes), factories assume defaults and produce samples off-spec. Common Objective's 2024 benchmark found 43% of first-sample rejections trace to documentation gaps, not factory error.

Do factories prefer AI-generated or human-generated tech packs?

Factories prefer complete, standardized tech packs — they do not care about the production method. Adstronaut's factory partners report that AI-generated tech packs are often more consistent than human-generated ones because the AI applies the same templates and terminology every time. Inconsistency between the same designer's own documents is a common pain point factories cite.

How do I verify my tech pack is factory-grade before sending it?

Run the seven-criterion checklist: (1) is every seam labeled with an ASTM stitch code, (2) does every color have a Pantone TCX/TPX code, (3) does every measurement have a tolerance, (4) is the size chart filled for all sizes, (5) does every BOM row have a supplier field, (6) do sketch arrows match chart rows, (7) does the PDF hold up at 200% zoom. Seven of seven passes factory review.


Generate a factory-grade tech pack with Adstronaut in under 15 minutes →


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