System Boundaries

Once the purposes for preparing an LCI are determined, the analyst should specifically define the system. (A system is a collection of operations that together perform some clearly defined functions.) In defining the system, the analysts must first set the system boundaries. A complete LCI sets the boundaries of the total system broadly to quantify resources, energy use, and environmental releases throughout the entire cycle of a product or process, as shown in Figure 3.4.1. For example, the three steps of manufacturing are shown in Figure 3.4.2.

As shown in Figure 3.4.1, a life cycle comprises the four stages described next.

Trash Cash Machine

Trash Cash Machine

How recyclable trash can save the world and bank us huge profits! Get All The Support And Guidance You Need To Be A Success At Recycling! This Book Is One Of The Most Valuable Resources In The World When It Comes To How To Make Profits With Trash!

Get My Free Ebook

Post a comment