What that means is: I like working on projects that place a wide variety of demands on the knowledge that I have and the skills that I possess. That is why I like working on big machines and/or big buildings. In the photo on the left I am holding up a liquid level control I designed using a programmable logic controller or ( PLC ) as they are called. These are miniature industrial computers that execute programs in written in boolean logic. Into this control I programmed and algorithm I wrote to compensate for water splashes and waves in a tank as it fills up with chemicals so you can get a true liquid level reading as it fills up.
In the photo on the right I am kneeling in front of the control system of a packaging machine I rebuilt back to better than new condition. I used the existing wiring to build in and integrate exotic technology like AC variable frequency motor drives. When I am done, to the operators the machine looks and runs the same as before. The advances I incorporate are totally transparent to the end user in most cases with a few minor exceptions. Because of this, there is no retraining of personnel needed to run the rebuilt machine, but the productity is higher. Training is an expense that costs money and causes delays until the operators get it right. I make sure this cost is kept to a minimum in my new equipment designs and/or rebuilds.