Reliability Terminology

Sometimes My friends ask me to differ some definitions: System failure, System error, System fault and Human error. actually, these definitions lead me some confusion while distinguishing between them.

After spending a little time to investigate these definitions, now I can distinguish them:

System failure
An event that occurs at some point in time when the system does not deliver a service as expected by its users

System error
An erroneous system state that can lead to system behaviour that is unexpected by system users.

System fault
A characteristic of a software system that can lead to a system error. For example, failure to initialise a variable could lead to that variable having the wrong value when it is used.

Human error or mistake
Human behaviour that results in the introduction of faults into a system.

---
name: hoang nguyen
nickname: mathhoang
Y!M: vietnam_hoangminhnguyen@yahoo.com
mail: vietnam_hoangminhnguyen@Yahoo.com
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What is CASE (Computer-Aided Software Engineering)

Software systems that are intended to provide automated support for software process activities.

CASE systems are often used for method support.

Upper-CASE
Tools to support the early process activities of requirements and design;

Lower-CASE
Tools to support later activities such as programming, debugging and testing.

---
name: hoang nguyen
nickname: mathhoang
Y!M: vietnam_hoangminhnguyen@yahoo.com
mail: vietnam_hoangminhnguyen@Yahoo.com
---

Write code in blogspot

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<code>



</code>

</pre>



---
name: hoang nguyen
nickname: mathhoang
Y!M: vietnam_hoangminhnguyen@yahoo.com
mail: vietnam_hoangminhnguyen@Yahoo.com
---