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The processing, transport and storage of flammable materials in the form of dust generates an explosion risk due to the possibility of initiating potentially explosive atmospheres created by dust suspended in air with various ignition sources, some of which may be their own installations. As explosions can cause human casualties and severe property damage, the explosion risk assessment and the application of appropriate measures by manufacturers and users of installations to prevent the ignition of explosive atmos...

Costs are present in many daily decisions they take managers from lower hierarchical levels, but especially importa nt for strategic decision taken at top management level. The very adoption of certain strategies fo r the enterprise is based on analytical considerations which require methods of ec onomic and financial evaluation of projects, methods that can not be imagined outside costs. Allocation of resources to the enterprise are based on estimated costs, just as they and replacement of assets. Computation of ...