You're making this way more complicated than it needs to be. It's not an alerting system, it's a knob, like a thermostat. I turn the knob where I want it, the s

You're making this way more complicated than it needs to be. It's not an alerting system, it's a knob, like a thermostat. I turn the knob where I want it, the system follows the "run until this limit is hit" instruction. If I want to change my mind later, even after the limit is hit and the system shuts down, I can make that decision at that time. I don't want the system or anybody else to make it for me. As for the "purchase approval" nonsense -- if the knob isn't right for your company, then don't use it, but there are a huge number of companies where the guy turning the knob is the one and only person with any say over money being spent at all.