Cost: Money in the management of the project, the cost of implementation and the cost incurred for the change, repair software. Cost is one of the very important part in maintaining the software development activities.
The cost will increase when the error is found, because it will take more time and spend more resources to be able to fix it. Products are too many errors will cause the cost gets higher.
The cost to maintain the software
when customers asked to change certain parts of the software that will entail increased costs
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