Monsoon-proofing a stoneware shipment
A Jaipur ceramics studio ships 600 stoneware mugs a month directly to customers. Each mug goes into a 200 × 150 × 120 mm single-wall corrugated box, wrapped in two layers of 3 mm bubble wrap, with shredded paper filling the gaps. The courier bills on volumetric weight using a divisor of 5000. Damage claims run at 2.4% in dry months and 7.2% during the monsoon. Each claim costs ₹1,450 in refund, replacement and return freight, against a selling price of ₹1,200. Packaging materials currently cost ₹22 per parcel and courier charges are ₹85. The studio will accept up to ₹12 more per parcel in packaging cost, but no increase at all in billed shipping weight, and wants claims below 2% across the whole year.
1. Quantify the annual cost of damage and state the maximum justified spend per parcel.
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Annual volume is 7,200 parcels. Take four monsoon months: 2,400 × 7.2% = 173 claims. The other 4,800 × 2.4% = 115 claims. Total about 288 claims a year at ₹1,450 each - roughly ₹4.2 lakh a year, or ₹58 per parcel shipped.
The stated ₹12 cap is therefore not the binding constraint. Spending the full ₹12 costs ₹86,400 a year and would be justified if it removed even a quarter of the claims, which is worth over ₹1 lakh. The real constraint is the no-increase-in-billed-weight rule, because that is what silently eats the saving.
Note where the average is misleading: the dry-season 2.4% is the floor you must beat year-round, and the monsoon 7.2% is what the redesign is actually about. Designing to the annual average would leave the wet months untouched.
2. Propose a packaging change compatible with the constraints, and explain why the box dimensions should stay the same.
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Keep 200 × 150 × 120 exactly. At divisor 5000 the box is 3.6 L, billed at 0.72 kg. Enlarging to 230 × 170 × 140 gives 5.47 L and 1.09 kg, adding roughly ₹30–40 in freight - three times the allowance.
So buy strength inside the same envelope: double-wall board on the top and bottom panels only (+₹4), a die-cut corrugated cradle that suspends the mug 25 mm clear of every face in place of shredded paper (+₹5 net against the shred), and a 40 mm pad over the handle face (+₹2). Total ₹11.
Shredded paper is the weak link in the monsoon because it absorbs moisture, compacts and stops resisting. A cradle cut from the same board as the box does not. Reinforcing only two panels works because the drop orientation in courier sorting is broadly predictable.
3. Name one change that would reliably cut damage but that you would reject, and why.
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Reject: 30 mm of foam or air-pillow fill all round, achieved by upsizing the box to 240 × 190 × 170. It would certainly cut damage, and it is the first thing a supplier will suggest.
It fails on two counts. The box becomes 7.75 L, billed at 1.55 kg, more than doubling freight on a ₹1,200 product - nowhere near the ₹12 allowance. And loose fill shifts in transit, so the mug migrates to a corner over a long route, which is exactly the failure the cradle removes.
A secondary reject would be a plastic air-pillow system purely on positioning: the studio sells handmade, low-plastic ceramics, and customers open the box. A packaging fix that undercuts the product story is not a fix.