What is the target for the MPC algorithm?

[T1983M]

Hej all,

i am running the MPC alorithm for some days now together with my heat pump. The Setup is with Sonos TRVs with Direct Valve control and it is generally working like a charm.

But to what goal does the MPC optimize?
To keep the temperature stable by heating in bursts or by setting the valve % so that it just stays steady state? With my heatpump i prefer if all the radiators and the floor heating are moving between 40% and 60% valve opening. if they are higher consistently i will change my heating curve to adjust it back, the same if they are lower. I try to aim for a steady stae in the Heatpump and the valves

Now i am observing that some rooms are in (or close to) this steady state, while others open the valve for 10ish minutes every hour.

Basically all rooms carry a Type 22 radiator that behave simmilar, yet in the Workaway one i get these bursts....
Is that local Maximums the MPC optimizes towards. Is there a way to motivate it to go for more open valves. Or is this more a PID behaviour i should look for? I also rather have it a bit to warm / cold and have the valves open/close more gradual....