Dylan, great question. For a building, the life cycle of the building includes everything from start until the building would serve its useful life. You would need to consider the initial investment, how much it costs to operate the business and that includes expenses such as utilities and maintenance, and HOPEFULLY our building outlasts several systems which means that those costs are now included within the life span - or life cycle of the entire facility. Whereas, if a single component is being considered, such as the generator, it has an estimated useful life, perhaps it is ten years and after ten years, it has reached the end of it’s life cycle. I can be a bit confusing so let me know if you have more questions!