Design Interfaces Using Criteria
Design product component interfaces using established criteria.
Interface designs include the following:
• Origination
• Destination
• Stimulus and data characteristics for software
• Electrical, mechanical, and functional characteristics for hardware
• Services lines of communication
The criteria for interfaces frequently reflect critical parameters that must
be defined, or at least investigated, to ascertain their applicability.
These parameters are often peculiar to a given type of product (e.g.,
software, mechanical, electrical, and service) and are often associated
with safety, security, durability, and mission-critical characteristics.
Refer to the Identify Interface Requirements specific practice in the
Requirements Development process area for more information about
identifying product and product component interface requirements.
Typical Work Products
1. Interface design specifications
2. Interface control documents
3. Interface specification criteria
4. Rationale for selected interface design
Sub Practices
1. Define interface criteria.
These criteria can be a part of the organizational process assets.
Refer to the Organizational Process Definition process area for
more information about establishing and maintaining organizational
process assets.
2. Identify interfaces associated with other product components.
3. Identify interfaces associated with external items.
4. Identify interfaces between product components and the productrelated
lifecycle processes.
For example, such interfaces could include those between a product component
to be fabricated and the jigs and fixtures used to enable that fabrication during the
manufacturing process.
5. Apply the criteria to the interface design alternatives.
Refer to the Decision Analysis and Resolution process area for
more information about identifying criteria and selecting
alternatives based on those criteria.
6. Document the selected interface designs and the rationale for the
selection.
Design Interfaces Using CriteriaDesign product component interfaces using established criteria.Interface designs include the following:• Origination• Destination• Stimulus and data characteristics for software• Electrical, mechanical, and functional characteristics for hardware• Services lines of communicationThe criteria for interfaces frequently reflect critical parameters that mustbe defined, or at least investigated, to ascertain their applicability.These parameters are often peculiar to a given type of product (e.g.,software, mechanical, electrical, and service) and are often associatedwith safety, security, durability, and mission-critical characteristics.Refer to the Identify Interface Requirements specific practice in theRequirements Development process area for more information aboutidentifying product and product component interface requirements.Typical Work Products1. Interface design specifications2. Interface control documents3. Interface specification criteria4. Rationale for selected interface designSub Practices1. Define interface criteria.These criteria can be a part of the organizational process assets.Refer to the Organizational Process Definition process area formore information about establishing and maintaining organizationalprocess assets.2. Identify interfaces associated with other product components.3. Identify interfaces associated with external items.4. Identify interfaces between product components and the productrelatedlifecycle processes.For example, such interfaces could include those between a product componentto be fabricated and the jigs and fixtures used to enable that fabrication during themanufacturing process.5. Apply the criteria to the interface design alternatives.Refer to the Decision Analysis and Resolution process area formore information about identifying criteria and selectingalternatives based on those criteria.6. Document the selected interface designs and the rationale for theselection.
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