The challenge to design teams is to design an aircraft that achieves maximum mission effectiveness at minimum cost to the customer. Typically, a military aircraft has a service life of over 30 years. The total operation and support costs such as those involved in owning and operating an aircraft (spares, repairs and servicing) over this time, outweigh the initial cost of acquisition. Therefore, total Life Cycle Cost (LCC) must be minimised in the customer’s interest. The study of the cost of acquisition, operation and support and disposal is known as Life Cycle Cost analysis. To achieve the design challenge, British Aerospace use two main cost reduction techniques.