Industrial design
& smart manufacturing engineering
in Pasadena, California

A product that survives a drop test on a bench can still arrive broken at a customer dock. A single impact rarely does it. Freight damage mostly comes from repeated vibration over hundreds of miles, a forklift tine catching a corner, or a pallet stacked two units too high in a warehouse.

The first decision is what actually touches the product inside the box. Foam, corrugated inserts, and molded pulp all cushion an impact. Each behaves differently under repeated vibration rather than a single drop. A single shock test does not tell the whole story. Foam that looks fine after one hit can compress permanently after a week of highway travel, leaving the product loose inside a box that looked adequate on paper.

Heavier equipment usually needs a wooden crate rather than a cardboard carton. The crate design has its own logic. A product bolted directly to a shipping skid transfers shock through the bolts rather than into a fragile housing. The skid stays rigid. Internal blocking and bracing keep the unit from shifting sideways throughout the trip.

Corners and edges fail more often than flat faces. A forklift, a dolly, or a loading dock edge tends to strike a corner first. Corners take the hit. Reinforced corner posts, or a layout that keeps the most fragile part away from every outer edge, cut the failure rate more than adding a thicker layer of foam across the whole surface.

Orientation matters as much as cushioning. A pump or a motor with a preferred axis, or a control panel with a screen that should never lie face down, needs arrows and a clear top marked on every side someone might set the crate down on. Markings only help if the crate shape itself discourages the wrong orientation, ideally by making the correct side the only flat one to rest on. A busy dock worker will not always stop to read a label.

A product that will be palletized and stacked needs a top surface strong enough to carry the weight of an identical unit above it, plus the sway that comes from a moving truck over rough roads. That load path should be calculated during design, not assumed. A housing built to survive a drop is not automatically built to carry a stacked load for a week in transit.

Reusable packaging changes the calculation again. A crate meant to travel back and forth for service visits or trade shows needs latches and corners built for repeated opening, not a one-time seal, and cushioning that does not compress a little more with every trip. Foam chosen for a single outbound shipment often fails this test within a handful of round trips.

None of this replaces real transit testing. A prototype crate, loaded and shaken on a vibration table and dropped from dock height on every face and corner, shows weak points a drawing never reveals. Drawings do not fail. Real crates do, and only under real handling. Fixing a crate design before the first hundred units ship costs far less than fixing a pattern of damage claims after they arrive at a customer site.

Cable routing looks like a small detail until a product reaches its second or third revision. Every wire fights the same few centimeters of space as a new sensor or connector. Nothing about it stays small for long. Planning the path early prevents the tangle that follows.

A wiring harness should follow a small number of fixed channels rather than take whatever open path looks convenient at final assembly. Fixed channels, not improvised ones. Channels molded into the housing, or simple cable clips at regular intervals, keep every wire away from moving parts, sharp edges, and anything that generates heat.

Length matters more than it seems. A harness cut to the shortest possible distance leaves no slack for a technician to lift a board out for service. It leaves no room for a connector that needs to reach a slightly different spot after a design change. Slack is cheap now and expensive later. A little planned slack, coiled and secured rather than left loose, saves a full harness redesign down the line.

Power and signal wires should stay physically separated wherever the layout allows it. Running a sensor cable alongside a motor lead can introduce interference. That interference shows up as an intermittent fault, hard to trace once the product is out in the field. A gap of even a few centimeters, or a grounded metal divider between the two, avoids the problem entirely.

Connectors deserve as much attention as the cable itself. A connector that only fits one way prevents a costly assembly mistake, and keyed connectors cost very little more than unkeyed ones. Labeling each connector and its matching socket, even with something as simple as a printed number, cuts assembly and repair time considerably, and saves a puzzled technician from tracing wires by hand at midnight.

Strain relief at both ends of every cable run prevents a wire from working loose through vibration over months of operation. A cable tie alone is not strain relief. The tie has to anchor to a fixed point on the housing rather than simply bundle wires together, so the pulling force never reaches the solder joint or terminal. Anchoring is the whole point.

Serviceability should guide the layout as much as first assembly does. A harness routed so a technician has to remove six other parts to reach one connector slows every future repair. That adds up fast. It also raises the cost of ownership long after the sale. Building a service path into the routing plan, even if it adds a little length, pays back on every unit serviced.

Documentation closes the loop. A routing diagram, even a simple one, keeps the next revision from guessing at what a previous engineer intended. Without it, cable paths tend to drift with every hands-on fix, until a product that started with a tidy harness ends up with wires crossing everywhere a technician once needed quick access, and every new hire has to relearn the layout from scratch.