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Design life is the forecast life expectancy of products based on their design.Service life is the forecast life expectancy of products based on real world results.Design Life vs Service LifeDesign life is theoretical. When a product is first designed engineers can calculate how long it might last based on expected conditions, uses and physical properties of the item.Service life is based on a firm's operational experience in supporting products. For example, a firm that has deployed solar panels for 20+ years gains an understanding of how long they last in the field in a variety of climates. Service life is typically attached to operational conditions and is more likely to be used in a commercially binding document.
ExampleA high speed train manufacturer estimates design life as part of the planning for a new aircraft model. Before they enter into commercial agreements to support the new trains they calculate service life by looking at the operational costs and risks of similar models that have been on the market for an extended period of time.|
| Design Life | Service Life | | Definition | The forecast life expectancy of buildings, facilities, infrastructure, equipment, vehicles and products based on their design. | The forecast life expectancy of buildings, facilities, infrastructure, equipment, vehicles and products based on real world conditions. |
Reliability Engineering
This is the complete list of articles we have written about reliability engineering.
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A list of reliability engineering techniques.
Definitions of reliability engineering.
The difference between quality and reliability.
An overview of fail-safe design with a few examples.
A definition of reliability with examples.
A definition or error tolerance with examples.
The common types of overengineering.
A definition of entropy with examples.
A definition of tensile strength with examples.
A comprehensive guide to design.
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The arrangement of the elements of a design or work of art.
The difference between modeless and contextual user interfaces explained.
A list of common types of design.
The steps in a design process.
The common types of design quality.
A definition of universal design with examples.
A definition of sensory design with examples.
An overview of emotional design.
The definition of elegance with examples.
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