Unexpected change in controlled variable in DOE
Hi, I made a custom design to understand the impact of caoting temperature and speed on performance. I kept all the parameters same. However, unexpectedly I had to vary the nozzle air pressure for different runs as it was not possible to make the coatings at same air pressure. So, my question here is that how can i include the change in air pressure in the DOE. I cannot afford any more runs.Is the...