What does a product really cost after the sale?
When does extended device diagnostics pay for itself? A reproducible service-cost model, scale thresholds, sensitivity analysis and a production decision record.
Notes
Electronics, software and engineering decisions.
APIs change, devices remain: compatibility over several years
How can an API add quality and absent measurements without silently changing meaning? JSON and proto3 contracts, a version matrix, migration, history and rollback.
Why does a device reset when it transmits?
Diagnosing resets during transmission: measurement location, current pulses, connection resistance, capacitors, regulator behavior, and a reproducible voltage-droop model.
The model is 95% accurate. Should it make the decision?
Choosing an AI decision threshold around error costs and inspection capacity: a reproducible example, calibration, deferral and acceptance criteria.
The prototype works. Will the hundredth unit work too?
Moving from a working prototype to a repeatable batch: tolerances, enclosure effects, fixture uncertainty and a practical acceptance record.
Big partner, small startup. Building collaboration that stands up to reality
How to assess a corporate partner's commitments, share costs and responsibilities, and set limits on a startup's investment. With a financial example and a practical pilot agreement worksheet.
