The purpose of this piece of work is to determine the economical requirements of a certain type vessel; trading at a certain route, under certain market environment and based on a certain Technical Management Company. Moreover, at the same time, the aim is to focus on what the key factors are and in what ways they are able to have an effect on the demand and supply of the market. In addition, with the view to achieving a perfect understanding of the role that each factor plays in the Technical Department, it uses one model ship (Ultra-Handymax 55,426 DWT) and it is making an attempt to calculate the spare parts running costs for a 5 year interval. Of course, such an effort involves the collection of proper data which will determine the whole procedure leading to the desirable result. In some cases, a Shipping Company may be obliged to follow certain regulations in order to succeed in reaching the actual target.