Try a wider range, thinking about more severe conditions and imagination for wider process window are required for good engineer.
Try a wider range
Thinking about more severe conditions
Imagination for wider process window
Others exist in my head but now it is a time to sleep. ZZZZ
Try a wider range
Sometimes we set a narrow range for experiment or test. The result would be along with the ideal curve (or line). However, let's imagine an exponential curve, like derivative, you well know that narrow range might be approximated by a straight line. Therefore we should set 10 times and one tenth of the initial value which we could imagine. The result might not be fitting with ideal line. But it is important to think "Why it is not fit ?". Sometimes there lurks something important. So you can find it by this procedure.
Thinking about more severe conditions
This is similar with above sentence. but temperature, humidity or other one cannot set 10 times of room temperature. (25 deg/C is 298 deg/K. 2980 K (10 times of 298K)) is too high to test other than space or high temperature engineer. So we should set more sever condition same as above reason. So we could add other conditions (e.g. humidity, vibration, pressure, UV (sunshine) or etc.)
Imagination for wider process window
It is important to realize stable multi production. The imagination would request us above conditions. Such requirements would be useful for stable process. Otherwise, narrow process window would induce us difficult to produce. It is not required, therefore the imagination is important.
Others exist in my head but now it is a time to sleep. ZZZZ