TAILIEUCHUNG - Lecture Software construction - Lecture 21: Software change, evolution and maintenance

It is impossible to produce system of any size which do not need to be changed. Once software is put into use, new requirements emerge and existing requirements changes as the business running that software changes. Parts of the software may have to be modified to correct errors that are found in operation, improve its performance or other non-functional characteristics. | Software Construction Lecture 21 Software Change, Evolution and Maintenance Software Evolution It is impossible to produce system of any size which do not need to be changed. Once software is put into use, new requirements emerge and existing requirements changes as the business running that software changes. Parts of the software may have to be modified to correct errors that are found in operation, improve its performance or other non-functional characteristics. All of this means that, after delivery, software systems always evolve in response to demand for change. Software change Software change is inevitable New requirements emerge when the software is used The business environment changes Errors must be repaired New equipment must be accommodated The performance or reliability may have to be improved A key problem for organisations is implementing and managing change to their legacy systems Software change strategies Software maintenance Changes are made in response to .

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