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___________make extensive use of iterative programming,involving users often,and keeping programmers open to modifications while the development is still under way.
Relative
A person connected to another or others by blood or marriage, or a concept that is considered in relation or proportion to something else.
Cost-benefit Analysis
A systematic approach to estimate the strengths and weaknesses of alternatives in terms of their costs and benefits, often used in decision making and project evaluations.
Economic Efficiency
The optimal allocation of resources to maximize the production of goods and services.
Marginal Happiness
The additional satisfaction or utility that a person gains from receiving or consuming one more unit of a good or service.
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