THE COPLAIN BLOG
Job aid design, work instruction writing, and shop-floor documentation guides for manufacturers.
7 articles
We ran the numbers on a real automotive line stop caused by an ambiguous torque callout. The total cost — including scrap, rework, investigation, and customer impact — was staggering.
A tier-1 aerospace supplier was drowning in legacy procedures. Some dated back to 1997. Here's the step-by-step process they used to cut document length by 83% without losing a single compliance requirement.
Cognitive science, shop floor physics, and audit requirements all point to the same seven principles. A job aid that doesn't survive the lamination test isn't a job aid yet.
Most work instructions are written by engineers for engineers. Here are the seven essential elements — and the specific writing techniques — that make the difference between a procedure operators follow and one they ignore.
GD&T is more precise than plus/minus tolerancing and less forgiving of misinterpretation. This is the practical introduction that explains what each symbol actually means in manufacturing — not just what the standard says.
Undertorqued fasteners loosen. Overtorqued fasteners fail. Both are documentation problems as much as process problems — here is how to write torque callouts that prevent both.
A 40-page SOP that operators read once during training and never reference again is a compliance record, not a quality control. Here is a five-step process for converting dense procedural documents into visual job aids operators actually use at the workstation.