There are a multitude of factors we take into account depending on the application. These factors are generally fleshed out in advance of our arrival or in some cases adjustments are made on the fly the day of arrival.
For example, at the modern museum of art, it required a 60 ft aerial lift that weighs 22,000lbs to access specific points across the campus. This meant that the lift had to be driven over the grass while not creating ruts in the ground, breaking the industrial sprinkler system or harming the low hanging limbs of the very trees we were tasked to decorate. So we formulated a plan, by isolating each risk one at a time than allocate a team to executes the plan. We are happy to report that 85 trees later that zero sprinklers were harmed in the making of that display.