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What is Wear And Tear?

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Wear and tear is the normal and expected decline in the quality of physical items that occurs over time. This is commonly used to express the idea that infrastructure, architecture, products and equipment depreciate with time.

Second Law of Thermodynamics

The Second Law of Thermodynamics is a principle of physics that states that the total entropy of an isolated system always increases over time. In other words, all things tend to move from a state of order to disorder and this process is typically irreversible. The principle suggests that things can't be designed and constructed to last forever. Wear and tear is unavoidable.

Software & Data

Software and data undergoes a similar process to wear and tear. This is known as software entropy and data rot.
Overview: Wear And Tear
The normal and expected level of quality decline that occurs over time in physical items such as infrastructure and products.
Related Concepts

Reliability Engineering

This is the complete list of articles we have written about reliability engineering.
Cold Standby
Defensive Design
Design Debt
Design Life
Error Tolerance
Fault Tolerance
Graceful Degradation
Latent Error
Material Strength
Mistake Proofing
Wear And Tear
More ...
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Reliability Engineering

A list of reliability engineering techniques.

Reliability Engineering Definition

The definition of reliability engineering.

Quality vs Reliability

The difference between quality and reliability.


An overview of fail-safe design with a few examples.


A definition of reliability with examples.

Error Tolerance

A definition or error tolerance with examples.

Design Life vs Service Life

The difference between design life and service life.


The common types of overengineering.


A definition of entropy with examples.

Tensile Strength

A definition of tensile strength with examples.

Active vs Passive

The difference between active and passive safety.

Defensive Design

An overview of defensive design.

Self-Destruct Mechanism

An overview of self-destruct mechanisms as a safety feature.

Tactile Information

The common types of tactile information.

Flight Envelope Protection

An overview of flight envelope protection.

Earthquake Detection System

An overview of earthquake detection systems.


The definition of hazard with examples.

Product Safety

Common types of product safety.

Err On The Side Of Caution

The definition of err on the side of caution with examples.
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