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Chapter 7 - a model developed in a company of the production field and maintenance radar.

7.3 Comparison and conclusions.

To this point, after to have dealt in separate way the two models, it is interesting to confront of the main characteristics.

Model SELEX-SI

Developed model

IT OBJECTS to YOU

Forecast of the costs in order to under investigation support the system radar, during the period of CLS, operating with a reactive approach, that is as already it has been operated in order to support the system in a previous program, from which the input have been taken.

Forecast of the costs and the schedulazione of the actions in the time in order to support the system under investigation radar, during the period of CLS, operating with an approach for-assets.

RELATIVE INPUT To the OBSOLESCENCE

Data of obsolescence gain to you from the historian of a previous program, in which the same system in reactive way has been supported.

Data of obsolescence gain to you from probabilistiche forecasts based on sale data, obtained through a tool trade them.

OUTPUT

Cost for the support of the system during the period of CLS.

Optimal solution in terms of costs in order to support the system during the period of CLS and schedulazione of the activities in the time.

MODALITÁ IN THE CALCULATION

The costs come calculate to you in macrocospic way as percentage of the costs generates them.

Not there is update, but a rincaro is considered of the prices in the time.

They do not come considers costs you of maintenance to supply for the Last Buy.

Considerari costs of monitoring do not come.

The costs are calculate to you in punctual way holding in consideration the single members who become obsolete.
Useful it is also to confront the several one turns out obtained to you.
In the successive table they come shown the obtainable costs of resolution in the various cases exposed in the previous paragraphs: in the entitled column MODEL comes brought back the type of adopted strategy in order to obtain the resolution cost, while in the entitled column CASE comes specified if the optimization has been made considering the minimum of the costs of resolution for every LRU (Base) or the brought back cost is the fruit of the made optimization, beginning from the case base considering the several actions in the time (Optimal), that is considering to postpone the moment of the redesign.


Table 7.6: Economic comparison of turns out to you.

To they of these goes turns out you economic, would have to be carried out, to this point, an analysis of technical feasibility that indicates effectively which is the really implementabile solution: it is possible, in fact, that the optimal solution is not perseguibile for technical reasons and that the doubts raises to you in the course of the experimentation, concrete problems are revealed to which it must make forehead.
As it can be seen, but, from the percentages of saving brought back in the table, the developed model, also in the event worse, is more and more convenient regarding the model previously used in SELEX-SI and based on a reactive approach to the obsolescence.
Such result door to the unavoidable ascertainment, as already pointed out in chapters it generates them on the problematic ones of the obsolescence, than a reactive approach to the problem, cause an increase, sometimes substantial, of the resolution costs.
The development of this model, during the period of stage, has placed the bases for a new way to face the obsolescence, in a company a lot ahead in the study of these aspects of the logistics: also having a division of Custumer Support to the vanguard for the problems legacies to rebelling of the obsolescence, in fact, although it is always succeeded to find an just solution, lacks still that tied previsional sensibility to the total costs, in the time, of resolution.
In general terms, also existing tool it trades them in a position to previewing the moment in which a member he will not be more available on the market, are still least the instruments whom they allow to have a total vision of the costs legacies the obsolescence, for the support of a complex system during its along life cycle; same speech is worth for models that allow to optimize the resolution costs through a action plan, constructed former-ante, so as to to support the system in possible the more effective and efficient way.
Taking cue from tool the MOCA, described in the CAP. 6, the developed model has intentional to be a first attempt in order to make to be born a sensibility of the costs, legacies to the resolution of the obsolescences, for the support of a complex system during its operating life.

 

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