Enterprise resource planning (ERP) systems are intended to eliminate the problems of
multiple systems. An ERP system integrates all of a company’s operations into a single
information system that includes both financial and non-financial data. Data can thus be
entered once and subsequently retrieved by any division of the entity requiring that
data. For example, customer information can initially be entered by the sales force and
then later used and updated by shipping and accounting (upon the occurrence of a
sale).
Cost structures and cost–volume relationships
The first area that we need to consider in more detail is cost structures. At a simple
level, costs can be regarded as either fixed or variable. Fixed costs are defined as those
that do not vary as a result of the level of cost-driver activities undertaken, while variable
costs change in direct proportion to this.
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