Value analysis and value engineering are techniques used to identify unnecessary costs in products, processes, and services. Value analysis is traditionally used after development to analyze existing offerings, while value engineering is used during design and development stages. Both use a team approach and function analysis methodology to reliably deliver necessary functions at the lowest total cost over the lifecycle in order to maximize value for the customer. Larry Miles is considered the founder of these techniques which he developed at GE in the 1940s and which have since been widely adopted.