The objective towards which this job has been projected is to try to estimate the relative costs you to the management and solution of the obsolescence for the support of a complex system, during the phase of uses: this problem, in fact, has provoked remarkable interest in the within of the search, above all American and tied to the military atmosphere, in how much it is inasmuch as, to make forehead to obsolescence problems, it is becoming one of the greater ones cost driver in the support of equipment and arranges electronic complexes produced in limited number.
The studies that are capacities ahead, have allowed to develop methods and tool it trades them in a position to previewing the moment in which a member, it leave of the complex system to support, will not be more available on the market, but still little has been made in relation to the prioristic esteem of the costs legacies to this activity of support. Moreover, in many business truths, the approach that is followed in order to make forehead to these problems is of reactive type, that is knowledge of the single obsolescence in the moment is taken in which this effectively manifest one, with unavoidable increase of the resolution costs.
Therefore, in last analysis, the study carried out in this job, beyond to the esteem of the costs, has like attempt that one to use a proattivo approach to the problem to the aim to develop a action plan that it allows a optimization of the costs.
The concrete cue for the development of the elaborated present has been supplied from the SELEX-SI near which, in the plant of Giugliano in Campania, near '' the Business Unit Custumer Support/Engineering/Support to the product '', during a stage of the duration of seven months, it has been possible to enter in concrete terms in contact with the problematic ones tied to the support of systems radar during their cycle of life and, in particular, in the period of durations of a contract CLS (Contractor Logistic Support) that the company offers like additional service to the own customers.
To the aim of having a enough articulate vision of the problem obsolescences, first part of the job is stopped on useful theoretical aspects for the learning of the general ideas them and of the instruments it uses you in the part experiences them of the elaborated one. Moreover, siccome all the found information, come from articles or elaborate to you of military character, or analogous, completely independent between they, it has been attempted to give to such information an only body, so as to to create a mental distance through which possession one total vision of the problem.
In the first one Chapter it has been made a short one excursus on makes of the logistics and the cycle of acquisition of a product, in how much, to such concepts many times over makes reference in the course of the trattazione.
In the second Chapter, after to have introduced the case of study and described to the system radar, for which the concrete analysis of the part has been developed experiences them of the thesis, it has been explained in what consists to supply a service of type Contractor Logisti Support (CLS) for a such system. At last, they have been analyzes you several to the costs legacies to the CLS activity that the fornitrice company must support: between these there are, exactly, those legacies to the management and solution of the obsolescences.
In the third party Chapter it has been tried to define the problem obsolescences, placing the attention also on the causes historical-economic that have determined it.
In the quarter Chapter they come described which are the typical approaches to the problem obsolescences, that is that proattivo and that reagent, and which are the resolutive actions that can be undertaken in order to resolve it.
In fifth Chapter, having understood, from the slight knowledge learned, than the better way in order to face the obsolescence it is to try to preview of rebelling, has been described a previsional method for the cycle of life of the electronic members; on such method, the forecast supplied from the tool is based trades used them in order to gain some of the input of the model developed during the period of stage.
In sixth Chapter it has been described a methodology and a tool it develops near the University of Maryland from the members of the LIME (Computer to you Aided Life Cycle Engineering) Consortium: it has been just the study of this tool that it has placed the bases for the development of the model described in the last one Chapter of the thesis.
In seventh Chapter, at last, the developed model has been described and introduced it turns out obtained through the experimentation made on the system taken radar to you to reference.