lecture-9 - CPSC 491 Lecture Notes Fall 2013 1 Overview...

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CPSC 491 Lecture Notes Fall 2013 1 Overview Topics Requirements (cont.) Prioritization Estimation Reading Ch 2: 48–67 Key Ideas Types of requirements Tips for writing good requirements Tips for determining priorities Planning Poker basics 1
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2 Requirements Analysis Customers rarely provide succinct, complete, well-organized lists of requirements So, as requirements analysts: it is our job to analyze and organize the information we get to create a useful set of requirement statements (specification) 3 Types of Requirements Business requirements external (business) objectives Business rules constraints imposed on the system due to the nature of the business e.g., when certain tasks must happen, policies must be followed Functional requirements features feature (function) of the system e.g., user stories (although less “formal”) Non-Functional requirements characteristics characteristic or attribute of the system (or of a feature) fast, secure, reliable, easy-to-use, ... 2
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System Constraints hardware or software constraints e.g., must run on a phone or must be a windows application Beware unneccessary constraints! make sure it is really a constraint and not just a suggestion Solution Ideas requirements that mix what must be done with how to do it these require clarification by the user ...
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  • Fall '09
  • Requirements analysis, user stories, Planning poker, estimate card

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