Traffic
Traffic: fitment starts at the model plate
Three search behaviors dominate. A technician reads the model number off an equipment plate and looks for the parts that fit it. Somebody types the number printed on the component they just removed. Or a property manager describes a symptom, because they do not yet know which part failed. Each needs its own page type: an equipment model page listing every part that fits and how they are identified, a part page with electrical and dimensional specifications plus cross-references, and a symptom guide that reasons from behavior to likely component and ends with the parts. Most suppliers publish only a category tree, which serves none of the three.
