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| authors="Chris Sibbald" changeDate="2006-09-20T11:41:34.000-0700" version="0.2"> |
| <mainDescription><p>
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| Attributes are a very important source of requirements information. Just as every person has attributes (age, hair
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| color, gender), each requirement has a source, a relative importance, and time it was created. Attributes do more than
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| simply clarify a&nbsp;requirement.&nbsp; If created properly, they can yield significant information about the state of
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| the system. Just as you can run a database query to find all men with brown hair over age 30, given our human example,
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| you can run queries on the status of requirements to find&nbsp;all high-priority requirements from the customer in the
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| last 30 days. <a href="./../../../core.tech.common.base/guidances/supportingmaterials/references.tech_6CCF393.html" guid="_9ToeIB83Edqsvps02rpOOg">[TEL06]</a>
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| </p>
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| <h4>
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| Examples of attributes
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| </h4>
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| <p>
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| Listed below is a partial list of some common attributes and a brief description of their meaning. Some attributes are
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| best described as a number, date, Boolean (true or false) or a text field for entering free format comments. Other
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| attributes can be expressed as lists. For instance, priority type is a list of high, medium, and low; Weekday is a list
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| which includes Monday, Tuesday, and so on.
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| </p>
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| <p>
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| <em>Source</em> - Person, document or other origin of a given requirement.&nbsp; This is&nbsp;useful&nbsp;for
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| determining whom to call for questions or for grouping&nbsp;requirements according to the person making the demands.
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| </p>
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| <p>
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| <em>Priority</em> - Statement of relative importance of the requirement, either to the system (mandatory, critical,
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| optional) or to other requirements (high, medium, low). It is good to track the mandatory or high-priority
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| items&nbsp;as an indication of how well the system will meet the greatest needs or for compliance-related metrics.
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| </p>
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| <p>
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| <em>Assigned to</em> - Who in the organization is responsible for making sure the requirement is met (person's name or
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| organizational name).
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| </p>
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| <p>
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| <em>Comments</em> - Reviewer's or writer's comments on a requirement.
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| </p>
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| <p>
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| <em>Difficulty</em> - An indication of the level of effort needed or how hard it will be to implement the requirement
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| (high, medium, low).
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| </p>
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| <p>
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| <em>Status</em> - Degree of completeness (completed, partial, not started).
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| </p>
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| <p>
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| <em>Risk</em> - Confidence measure on the likelihood of meeting (or not meeting) a requirement. Could be high, medium,
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| low or the integers one through ten.
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| </p>
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| <p>
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| <em>Due By</em> - Date the requirement must be provided.
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| </p>
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| <p>
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| <em>Method of verification</em> - Qualification type to be used to verify that a requirement has been met: analysis,
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| demonstration, inspection, test, and walkthrough.
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| </p>
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| <p>
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| <em>Level of Test</em> - Describes the verification lifecycle stage at which the requirement is determined to be met:
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| unit test, component, system or product.
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| </p>
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| <p>
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| <em>Subsystem Allocation</em> - Name of system or subsystem a requirement is to be assigned to (for instance, flight
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| control module, wing assembly, passenger cabin).
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| </p>
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| <p>
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| <em>Test Number</em> - Identification of a specific test or other method of verification.
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| </p><br />
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