1. In General, this is defining the cyclical nature of living organisms. Tracking cradle to grave life stages: birth, growth, maturity, decay, and death across families, organizations, processes, products, and systems. 2. In Ecological impact, this is organizing activities such as resource extraction through processing, manufacturing, use, and disposal or recycling into the stages in the life of a material or product. 3. In Marketing, this is process for a good or service from rollout, maturity, stagnation, and decline as a pattern of demand.