Punjab PSEB Matric NSQF Apparel Made-Ups study materials
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Sorting, Selling or Burning: A Cutting Unit's Waste Decision

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Sorting, Selling or Burning: A Cutting Unit's Waste Decision

A Ludhiana job-work cutting and stitching unit processes 6,000 m of fabric a month at an average weight of 330 g per running metre. The cutting section records 14% waste by weight - trimmings, end bits, and rejected panels from a recurring print-matching fault. At present everything is sold unsorted to a scrap dealer at ₹15 per kg. A nearby shoddy yarn mill will pay ₹18 per kg for baled mixed waste, and a paper mill will pay ₹32 per kg for clean, sorted white cotton rags, provided the waste is segregated at the cutting table into white, coloured and synthetic heaps with no trims, labels or polybags mixed in. Proper sorting needs one additional helper at ₹12,000 a month. The unit also throws away about 12,000 polythene bags a month and burns the trimmings that nobody buys at the back of the plot. The owner's daughter, who has completed the NSQF course, wants to start making patchwork tote bags from the end bits and has asked for a viability calculation and her father's approval.

1. Calculate the monthly waste quantity and compare the three selling options net of sorting cost. What do you recommend?

Read the worked answer

Waste quantity:

  • Fabric processed: 6,000 m × 0.33 kg/m = 1,980 kg
  • Waste at 14%: 1,980 × 0.14 = 277 kg per month

Option A - unsorted to scrap dealer: 277 × ₹15 = ₹4,155

Option B - baled mixed waste to shoddy mill: 277 × ₹18 = ₹4,986 (gain ₹831, but you need a baling arrangement; a simple manual baler pays back within a few months at this gain)

Option C - sorted, with a paid helper. Assume segregation gets roughly 40% into the clean white cotton stream:

  • white: 0.40 × 277 = 111 kg × ₹32 = ₹3,552
  • coloured/mixed baled: 166 kg × ₹18 = ₹2,988
  • gross = ₹6,540
  • less helper ₹12,000 → minus ₹5,460

The judgement: Option C as designed loses money, because ₹12,000 of labour is being spread over only 277 kg of waste - about ₹43 per kg of handling cost against a ₹17 per kg price premium. The helper is the wrong answer at this volume; the segregation is the right answer.

Recommended plan:

  1. Segregate at source at zero extra labour cost. Put three labelled bins at the cutting tables and make segregation part of the cutter's normal task. Operators already handle every scrap; the only change is which bin it drops into.
  2. Then revenue = ₹6,540, i.e. ₹2,385 more per month than the current practice, with no new salary.
  3. Bale the mixed stream for the shoddy mill rather than selling loose.
  4. Revisit the paid sorting helper only if monthly waste volume triples.

2. The 14% waste is itself the bigger problem. Where would you attack it, and what is it worth?

Read the worked answer

14% cutting waste on woven shirting/casual wear is high. A well-run unit on comparable fabric runs at 9–11%, so roughly 3–5 percentage points here are recoverable - and unlike the scrap revenue, this is money spent on fabric you never needed to buy.

Value of the reduction:

  • 4% of 6,000 m = 240 m per month
  • At ₹180–250 per metre, that is roughly ₹43,000–₹60,000 per month, against ₹2,385 gained from better scrap selling. The source reduction is twenty times more valuable than the waste sale, and this comparison is the single most important insight in the case.

Where to attack:

  1. The recurring print-matching fault. Rejected panels are the most expensive form of waste because fabric, cutting labour and sometimes stitching are all lost. Fix it at the marker: check repeat length, add a matching allowance per panel, and confirm the print repeat before the marker is approved. Track the fault by marker number, not by cutter.
  2. Fabric inspection before cutting. A four-point inspection on receipt stops an off-repeat or skewed roll before it is spread. A ₹ of inspection beats a metre of re-cut.
  3. Marker efficiency. Review the marker on CAD; even 2 points of efficiency is 120 m a month. Check that small parts (collars, cuffs, yokes, pockets) are placed in the gaps.
  4. End-bit utilisation. Plan the lay so the last garments in a lay use the short fabric rather than generating a 1.5 m end bit.
  5. Operator feedback. Put the actual waste percentage on the cutting section's board weekly; what is measured drops.

Framing for the owner: the waste bin is the visible symptom; the marker and the fabric inspection are the disease.

3. Assess the tote-bag proposal and give the owner a decision with conditions. Deal with the open burning as well.

Read the worked answer

Tote bag viability - the honest numbers.

  • 277 kg of waste a month; assume half is usable as flat end bits, the rest is thin trims and print-reject panels of irregular shape.
  • A tote needs roughly 0.6 m² per bag. Say 130–150 bags a month is the realistic ceiling from usable offcuts.
  • Cost per bag: labour 25 minutes at ₹60/hour ≈ ₹25, plus lining, zip and thread ₹20 → ₹45–50 variable cost.
  • Market price for a decent patchwork tote: ₹150–200 retail, but the unit is a job-work supplier, not a retailer, so wholesale is nearer ₹100–120. Contribution ≈ ₹50–70 per bag, i.e. ₹7,000–10,000 a month if she can sell 130–150 pieces every month.

The real constraint is not production, it is selling. Patchwork tote bags are a crowded, seasonal market; the risk is a storeroom of unsold bags and a demoralised first-time entrepreneur.

Decision - approve as a pilot, with conditions:

  1. Start with a sample range of 10 designs, and sell them before cutting more.
  2. Use only the end bits that are genuinely flat and clean; do not convert print-reject panels into bags - a defect travels with the product and damages the brand on its first outing.
  3. Fix a transfer price for the raw material (even ₹2 per bag), so the venture is judged on real numbers and not on free inputs.
  4. Give it three months and one clear review: if 100 bags are not sold by then, stop.

Open burning. Stop it immediately. Burning textile waste releases smoke and dioxins, is a nuisance to neighbours, harms the workers standing nearby, and is exactly the sort of finding that kills a buyer's compliance audit. Replace it with baling and sale to the shoddy mill or an authorised recycler, and record the quantities. That single change is both a compliance fix and, with segregation in place, a small income line.