Because the measurement itself was noisy, and unless the operational metric was updated, it would never be stable. I’ve experienced this hell, where a client i

Because the measurement itself was noisy, and unless the operational metric was updated, it would never be stable. I’ve experienced this hell, where a client is “red” or “yellow” based on an a phone call with an account manager. That assessment is one of many inputs to a flawed operational metric that swings wildly. To extend your metaphor, imagine if you were constrained to only visually asses the food. Your fancy new remote monitoring system is simply a camera that allows a stupidly expensive pitmaster view your food and make an expert assessment. The result might get a little better, but it’s (probably) never going to be as good as using an actual thermometer.