Field cards

One page each, for the clipboard, the panel door, or the meeting. Every card prints on Letter or A4 and carries its sources and the date its content was checked.

• Timing budgetWi-Fi will never be deterministic, so prove the worst-case gap fits inside what the tightest timeout leaves for the radio.
• What to demand from your wireless vendorIf the vendor shows you the average, you are buying the average, so demand the worst case, proven on your floor.
• Loss-of-comms questions for every vehicle vendorYour access points decide how long a drop lasts; the vehicle decides what the drop costs.
• The first ten minutes of a dropA drop is diagnosed from its timestamp, its scope, and three systems' logs lined up on one clock.
• Spectrum and airtime inventoryQoS decides who waits in line; separation decides who is in the line at all, so count everything on the air first.

© Ben Rutter. Print and share any card unaltered, with its footer.