6.4 Materials Handling, Packaging & Unitization

Materials Handling, Packaging & Unitization

Materials handling and packaging are where supply chain theory meets the loading dock. They consume a large share of warehouse labour cost, determine how much freight a container carries, and cause most in-transit damage. ISM places them inside Logistics and Material Management, the largest scored section on Exam 2.

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Materials Handling Principles

The governing idea: handling adds cost and risk but adds no value to the product. A unit that is picked up, moved, set down, and picked up again is more expensive and more likely to be damaged, and is no more useful to the customer. The objective is therefore to eliminate touches, not merely to perform them faster.

Working principles drawn from the standard materials handling literature:

1. Planning — handling is designed as part of the facility and process, not improvised afterward.
2. Standardization — standardize methods, equipment, and unit loads without sacrificing flexibility.
3. Work minimization — reduce the amount of handling work, measured as weight times distance.
4. Ergonomics — design to human capability and limitation; injury cost is a real logistics cost.
5. Unit load — handle material in the largest practical unit load rather than as individual pieces.
6. Space utilization — use cubic space, not floor area alone.
7. System integration — handling, storage, and information flow are designed as one system.
8. Automation — automate where volume and repetition justify it, not as a default.
9. Environment — energy consumption and material reuse are design criteria.
10. Life cycle cost — evaluate handling equipment on total cost of ownership over its life, not on purchase price.

Equipment Classes

Exam anchor: automation raises fixed cost and lowers variable cost per unit, so it is justified by high, stable volume. In a volatile or seasonal operation, flexible labour-based handling frequently produces a lower total cost, because automated capacity sits idle in the trough and cannot be flexed in the peak.

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The Three Functions of Packaging

Packaging levels:

• Primary — contains the product and touches it directly (the bottle, the blister).
• Secondary — groups primary packages (the carton of twelve).
• Tertiary / transport — enables bulk movement (the pallet load, the shipping container).

The Packaging Trade-Off

Packaging cost moves against damage cost and freight cost, and the optimum is the minimum of the total:

$\text{Total} = \text{Packaging material and labour} + \text{Damage and claims} + \text{Freight (driven by weight and cube)} + \text{Disposal}$

Under-packaging shows up as damage claims and customer complaints. Over-packaging shows up as material cost, wasted cube, and disposal cost — and increasingly as a sustainability and regulatory exposure. Damage that occurs in transit was usually designed in at the packaging stage, which is why packaging engineering belongs in the value analysis team.

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Unitization and Pallets

Unitization consolidates many individual packages into one handling unit — most commonly a palletized load, secured by stretch wrap, strapping, or shrink film.

Pallet standards vary by region, and the mismatch is a genuine operational problem in international trade: the North American 48 × 40 inch pallet, the ISO 1200 × 800 mm Euro pallet, and the 1100 × 1100 mm pallet common in parts of Asia do not interchange cleanly, so goods are frequently re-palletized at a border or port — adding handling cost and damage risk that a buyer can eliminate by specifying the destination's pallet standard at origin.

Cube Utilization — Packaging Drives Freight Cost

A package that wastes cube pays freight on air. Two direct mechanisms:

1. Volumetric billing — parcel, air, and LCL freight bill on the greater of actual and dimensional weight, so wasted cube converts directly into freight cost.
2. Container and trailer fill — a case design that fits the pallet footprint poorly, or a pallet pattern that leaves gaps, reduces the units per container and raises the freight cost per unit.

Worked example. A case measures 16 × 12 × 10 inches. On a 48 × 40 inch pallet:

• Laid 16-inch dimension along the 48-inch length: 3 across × 3 deep (12 × 3 = 36 ≤ 40) = 9 cases per layer, leaving a 4-inch gap on the width.
• Rotated to a pinwheel pattern mixing orientations, a 48 × 40 footprint accommodates 10 cases per layer of the same case size.

At 5 layers, that is 45 versus 50 cases per pallet — an 11% improvement in units per pallet position, which flows straight through to storage cost, handling cost per unit, and units per container. This is exactly the kind of unglamorous analysis that produces durable savings, and it must be done at the packaging design stage because changing a case dimension after tooling and artwork are committed is expensive.

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Regulated Packaging

Wood Packaging Material — ISPM 15

ISPM 15 is the international phytosanitary standard governing solid wood packaging material — pallets, crates, dunnage, and bracing — used in international trade. Compliant material must be heat treated or fumigated and bear the official IPPC mark identifying the country, the producer, and the treatment. Non-compliant wood packaging can cause the entire shipment to be refused entry, re-exported, or destroyed at the importer's cost, even where the goods themselves are perfectly compliant. Processed materials such as plywood and oriented strand board are outside the scope, which is why many international shippers standardize on engineered-wood or plastic pallets to remove the risk entirely.

Hazardous Materials

Dangerous goods are governed by mode-specific regimes built on the United Nations Model Regulations: IATA Dangerous Goods Regulations for air, the IMDG Code for ocean, and national road and rail regulations. Requirements common to all:

• Correct classification into hazard class and packing group.
• UN-specification packaging, tested and marked for the class and quantity.
• Marking and labelling with UN number, proper shipping name, and hazard labels.
• Placarding of the transport unit.
• Documentation — a dangerous goods declaration or shipper's declaration.
• Trained personnel — training and certification are mandatory for anyone who prepares or offers dangerous goods, and are auditable.

Supply management link: dangerous goods obligations sit with the shipper who offers the goods for transport. If the buyer arranges the movement of hazardous material, the buyer's people and processes are in scope, and "the forwarder handles it" is not a defence.

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Returnable and Sustainable Packaging

Returnable transport items — plastic totes, metal racks, dunnage trays, IBCs, kegs — replace single-use packaging in closed-loop lanes.

The economics work in short, high-volume, closed loops — a plant and its tier-one suppliers, or a distribution centre and its own stores. They deteriorate rapidly as the loop lengthens, as the return leg empties out, and as ownership becomes ambiguous. Contracts must state who owns the assets, who pays for cleaning and repair, what the loss allowance is, and how unreturned units are charged — the terms that determine whether a returnable programme saves money or quietly leaks it.