The tech pack that produced six defects
A womenswear brand sends a tech pack to a Nicosia CMT unit for three samples of a wrap-front linen dress. The pack contains one flat sketch, front view only, six points of measure with no tolerances, the note 'fit: relaxed, true to size', and grading for size M only. It does not state seam allowance, grainline or notch positions, and the belt loops appear on the sketch but not in the bill of materials. The points-of-measure table says 'chest: 1 cm below armhole' and 'length: from HSP'. The factory measured the chest 2.5 cm below the armhole and the length from the back neck seam. The returned sample is 3 cm short in the body, the armhole is 1.5 cm too tight, the wrap ties sit 4 cm too low and are too short to tie at the back as drawn, the belt loops are missing and there is no topstitching on the side seams. The brand has a trade fair in ten days and can afford one more sample round.
1. Sort the six defects into those caused by the tech pack and those caused by the factory, and justify each classification.
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Attributable to the tech pack
- Body 3 cm short: 'length from HSP' is not a reproducible definition, and with no tolerance there was no agreed target. The pack gave no finished-length check point. Pack's fault.
- Armhole 1.5 cm tight: no armhole point of measure and no tolerance were specified, so the factory had nothing to measure against. Pack's fault, unless an armhole specification exists elsewhere - in which case it moves to the factory.
- Ties 4 cm too low: the flat shows ties but no placement dimension from a stated datum, such as the waist seam. Pack's fault.
- Ties too short: the pack specifies 60 cm, which cannot tie at the back as drawn. The drawing and the specification contradict each other. Pack's fault.
- Missing belt loops: they are drawn but absent from the bill of materials and construction notes. A factory builds to the BOM, not to a sketch. Pack's fault.
- No side-seam topstitching: no construction note, no stitch diagram, no topstitch width. Pack's fault.
Attributable to the factory
- Measuring the chest 2.5 cm below the armhole instead of 1 cm. The factory substituted its own measuring point instead of raising a query. Factory's fault, although the ambiguity is the root cause.
Principle worth stating A sample can only be judged against its pack. Where the pack is ambiguous, the defect belongs to the brand, because the factory will not stop production to guess - it will make a decision, and it will be the wrong one. Seven of these eight failures trace directly to missing information, not to poor sewing.
2. Rewrite the specification elements that caused the errors. Give concrete wording for points of measure, tolerances, seam allowance, notches, grainline and the bill of materials.
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Method statement at the top of the table 'All measurements taken on the garment laid flat, closed, relaxed for 4 hours, in centimetres. Tolerance ±0.5 cm on body widths and lengths, ±0.3 cm on placements, ±0.2 cm on topstitch width, unless stated otherwise.'
Points of measure, each with a datum and a method
- Chest width: straight across, 1.0 cm below the armhole seam, garment closed, flat; recorded as half measurement ×2.
- Waist width: at the waist seam, flat.
- Length: from the high shoulder point, straight down parallel to CF, to the finished hem.
- Armhole depth: from the high shoulder point straight down to the underarm seam.
- Wrap tie: 90 cm finished per tie, measured from the seam to the tip.
- Tie placement: upper edge of the tie 2 cm below the waist seam, measured on the side panel; specify left and right.
- Add shoulder width and hem width, which were missing entirely.
Drawings and construction
- One flat per view - front, back and side where needed - to scale, with grainline arrows, all notches, seam allowance stated as 1 cm with 1.5 cm at the hem, and callouts for every construction detail including 6 mm topstitching on the side seams and belt-loop positions and dimensions.
- Bill of materials: fabric, interfacing, thread type and colour, buttons, care label, size label, packaging, each with quantity per garment. The belt loops go into the BOM as a separate line with length and placement.
- Base size stated, graded for S, M and L with the grade rule, not M alone.
Why this fixes the defects Every failure above traces to a missing datum, a missing callout or a missing BOM line. None of it requires new design work; it requires the pack to say what the brand already knows.
3. Build a ten-day plan to get a sellable sample to the fair, including what you send, how you communicate it and what you do if the sample is not wearable.
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Days 1-2: fix the pack, not the dress
- Rewrite the points of measure with datums and tolerances, redraw front and back flats with notches, grainline, topstitching and tie placement, write the BOM and add a construction sheet.
- Send the pack with a marked-up photograph of the returned sample, each fault numbered and cross-referenced to the pack line that now prevents it. One document, not a chain of messages.
- Hold a twenty-minute call with the pattern maker and the line supervisor and confirm the outcome in writing the same day.
Days 3-4: pattern and consumption
- Ask the factory to check the pattern against the new points of measure before cutting, and to flag any consumption change from the longer ties; settle the price implication immediately rather than after sampling.
- Book the fit model for day 7 and confirm the courier or plan to collect in person.
Days 5-7: one sample only
- One sample, in the correct fabric, to the corrected pack. No parallel second version, which would split attention and the budget.
Day 8: fit
- Fit on the model, mark corrections, photograph front, back and side, and decide explicitly whether the sample is presentable or needs a second round.
Days 9-10: presentation
- If the sample is acceptable, finish, press, label and pack it with the corrected tech pack.
- If it is not wearable, take the corrected flats, the physical swatches, the size chart and a toiled sample, and present it openly as a fit sample with a firm date for the production sample. Buyers accept a clear timetable far more readily than a vague promise, and an honest sample plus a professional pack is what they are actually assessing.