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Explain the sources of information for a project.Existing system: Studying the existing system is one of the best ways to find out what the existing system lacks and what the new features to be added are.
Users: The end user can give the best information about what do they like the most about the system and what is it that is very difficult to stand it.
Project owners: Owners are the stakeholders and they have the best knowledge of what is to be build, when, how.
Questionnaires: Make a lot of user groups and not just developer give rating on a likert scale to judge the system.
Casual coffee counter chats: It is good to brainstorm with a free mind.
Artifacts: The documents that have been created in the entire process of getting married.
Existing system manuals and help manuals: Manuals about the existing system helps in understanding the features and functionalities in the previous system, its drawbacks etc.
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