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Wireless Site Survey

Measuring coverage on site rather than predicting it from a floor plan — including a countywide drive test in the era before the software existed.

Also known as Ekahau, Heat Mapping, Drive Test

Left to right is time. Each row is one of the 13 disciplines this one worked alongside, ordered so kindred disciplines sit next to each other rather than alphabetically — a landscape only means anything if neighboring rows belong together. Height is the work running in that domain in that year, weighted by what failure would have cost — life-safety ×3, a statutory obligation ×2.2, the estate itself ×1.5, an evaluation ×1. Every project declares which of those it was, so each ridge traces to an entry you can open and disagree with. Only the work that used this technology is counted, so what shows here is the company it kept rather than the record around it. Height and color are on the record-wide scale rather than this page’s own, so a modest estate draws a modest landscape and any two of these pages can be read against each other.

The survey methodology the practice used for diagnosing RF problems was written here and then walked with — writing the procedure and then working the sites against it is how the procedure got good. It was applied across Flagler Hospital, Baptist Health, Georgia-Pacific and Kerzner International.

Surveys done on site with Ekahau across hospital estates — Baptist Health, Nemours, Flagler — because clinical wireless has to hold in stairwells, lift shafts and shielded imaging suites, which a floor plan will not tell you.

The same approach at Fort Stewart, and on plant floors at Nissan and Georgia-Pacific with the lines running.

Before the tooling existed, the long way: the Nassau County Sheriff’s Office countywide survey was done by driving the county, recording measured signal strength point after point, and building the coverage heat maps in AutoCAD’s survey tools from the readings.

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