CHAPTER I the simulation in the productive systems
The real systems, defined like 'insiemi' of interacting entities, are characterize to you from elevated complexity, dinamicitą and
chance; that renders the understanding of the behavior of the system difficult and therefore its rationalization and management.
The simulation is an important instrument of support to the decisions that the opportunity to see offers to work just
arranges in a computer.
With the term of simulation those techniques agree that with the aid of the calculating “they imitate”, that is simulate
the behavior of a system.
Many of the recent packages of simulation show a tendency to go away from first form to you that they supplied
a simplified approximation of the real world that they tried to emulate.
The first limited simulators were introduced to the customer with and often fixed options in terms of control and turn out to you; they gave
limited freedom of exploration and small interattivitą.
Drawing advantage from the power of odierni personal the computers, from the development of the nets of transmission of the information and
Internet, with emerging of concepts which connettivitą and convergence, with the spread of systems informed to us and
telecommunicationses, are hour possible to offer simulation atmospheres that they faithfully reply the experiences of the real world.
This especially in the within of the planning and the systems analysis of productive and logistic type also from part of
not specialist customers.
The problem of the planning of complex systems, integrated and characterizes to you from a typically dynamics nature and stocastica
he difficultly turns out in fact affrontabile without the resource to simulation methodologies.
In particular the simulation models concur to estimate a priori the obtainable performances from the system considered before
still to proceed to its realization or modification.
In this way it is possible to preview the behavior of the system to varying of conditions and parameters, to estimate all
the pointers of technical and economic performances, to find the solutions more opportune, reducing the exercise and investment costs
and limiting the risks.
A typical application case as an example regards the problems created from the launch of a new product in production.
It can be necessary in such case to estimate and to confront various configurations of the inserted
interoperazionali warehouses between the several ones is made of the production process, with the scope to maximize the productive ability.
Moreover, in the within of the political of maintenance to adopt, porsi can the problem verify the effects induced
on the system from eventual breakdowns or wrong operations of means of production; problems of this type can easily be
face to you with simulation methodologies.
The employment of such methodologies can regard in general terms:
Making reference to the problem of the corrected dimensioning of the systems of material handling it characterizes to you from an elevated
level of automation, turns out obvious like the complex nature, integrated and dynamics of the problem it often renders
the resource to simulation methodologies unavoidable, above all in presence of one strongly variability of the flows of materials.
To orient in the choice between the various languages and packages software available for the simulation constitutes a not negligible
problem from the moment that one chosen mistaken can render difficult, if not impossible, the “modellizzazione” of
a particular considered real system.
As far as the systems of productive and logistic type, the more opportune choice between the various types of software available
on the market must be made with criterion so as to to concur with the expert customer not to estimate preventively
the problems which encounter will go having decided to resort to simulation techniques and therefore to estimate the resources
(temporal and economic) and the competences (computer science) above all necessary.
One chosen oculata in so far as is fundamental in how much, because of the dinamicitą and unforeseeable of the total market,
the enterprises must rethink and redesign the inner processes and the external relations using instruments and methodologies
finalized to the obtaining of a competitive advantage in the optical of:
Draft therefore of the search of the excellence that pushes the enterprises to adopt methodologies of simulation more and more
oriented to follow more rises levels to you than efficiency, effectiveness, flexibility and reactivity.
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