What will be the purchase price if the cruise ship's needs for freshwater are to be covered with MSF plants? It is assumed that the cruise ship and the freshwater plants have a life span of at least 25 years, so differences in the cost of day-to-day operation of the plants could be of great importance when the costs are calculated over the entire lifetime. The present value of the purchase price and the cost of electricity, chemicals and other operations over the lifetime is termed LCC = Life Cycle Cost.