All the more, the additional influence of vapor boil-up on the structure of the optimal control pattern is observed, as well. Figure plots cases for an increased vapor boil-up, concerning conditions and final time extensions. Observations: the total number of cycles change with the greatest decrease in vapor boil-up of 10, by disappearing of 5 cycles; but further "gradual/stepwise" decrease results in the "equal decrease", since in the next step of the decrease by 2, two cycles disappear. This is in accordance with the "analog" study done for the previous chapter, namely the high-pressurized process, where the same rule" is governed.