Total life-cycle costing normally starts from the premise that the life cycle of a product or service has phases. For some businesses, particularly those engaged in an advanced manufacturing environment, a very high proportion (perhaps as much as 80% ) of the total costs incurred over the life of a particular product are either incurred, or committed, at the phase. pre-production production post-production decommissioning Total life-cycle costing normally starts from the premise that the life cycle of a product or service has phases. For some businesses, particularly those engaged in an advanced manufacturing environment, a very high proportion (perhaps as muct tal costs incurred over the life of a particular product are either incurred, or committed, at the phase