definition of performance tests, and subsets of them

Author: mariojmdavid

content/06.quality_criteria.md

@@ -38,47 +38,46 @@ design analysis or side-effects to external systems.
   * **[SvcQC.Fun01.1]** Functional tests SHOULD be checked automatically.
   * **[SvcQC.Fun01.2]** Functional tests SHOULD include the public APIs of the **Service**.
   * **[SvcQC.Fun01.3]** Functional tests SHOULD include the Web interface of the **Service**.
+
 * **[SvcQC.Fun04]** Functional tests SHOULD be provided by the developers of the inderlying
   software. [SQA-QC.Fun04].
 
-### Performace and Stress tests [SvcQC.Per]
+### Performace tests [SvcQC.Per]
 
 Performance testing verifies that the software meets the specified performance
 requirements and assesses performance characteristics - for instance,
 capacity and response time [@url:http://www.swebok.org].
 
-Stress testing exercises software at the maximum design load, as well as beyond it,
+Stress or Load testing, exercises software at the maximum design load, as well as beyond it,
 with the goal of determining the behavioral limits, and to test defense
-mechanisms in critical systems [@url:http://www.swebok.org].
-
-Stress testing is a subset of Performance testing
+mechanisms in critical systems [@url:http://www.swebok.org]. *Stress testing is
+a subset of Performance testing*
 [@url:https://www.geeksforgeeks.org/difference-between-performance-and-stress-testing/].
 
+Scalability testing is test methodology in which an application’s or **Service**
+performance is measured in terms of its ability to scale up *and/or* scale out the
+number of user requests or other such performance measure attributes, through
+an increase in the amount of available resources. The definition
+is based on [@url:https://dl.acm.org/doi/10.1145/2737182.2737185].
+*Scalability testing is a subset of Performance testing*.
+
+Elasticity testing is adequate to **Services** in cloud resources or infrastructures.
+Elasticity is based on how quickly a **Services** in a cloud environment is able to
+adapt [@url:https://dl.acm.org/doi/10.1145/2737182.2737185], in response
+to variable demand or workload for the software service [@doi:10.1186/s13677-019-0134-y].
+*Elasticity testing is a subset of Performance testing*.
+
 * **[SvcQC.Per01]** Performance testing SHOULD be carried out to check the
   **Service** performance under varying loads.
+
 * **[SvcQC.Per02]** Stress testing SHOULD be carried out to check the
   **Service** to determine the behavioral limits under sudden increased load.
 
-### Scalability tests [SvcQC.Sca]
-
-**TO BE REVIEWED**
-
-Scalability Testing is a non-functional test methodology in which an
-application’s performance is measured in terms of its ability to scale
-up or scale down the number of user requests or other such performance
-measure attributes [@url:https://www.softwaretestinghelp.com/what-is-scalability-testing/].
-
-* **[SvcQC.Sca01]**
-
-### Elasticity tests [SvcQC.Ela]
-
-**TO BE REVIEWED**
-
-Elasticity is the level of autonomous adaptation provided by the
-cloud layer in response to variable demand for the software
-service [@doi:10.1186/s13677-019-0134-y].
+* **[SvcQC.Per03]** Scalability testing MAY be carried out to check the
+  **Service** hability to scale up *and/or* scale out when its load reach the limits.
 
-* **[SvcQC.Ela01]**
+* **[SvcQC.Per04]** Elasticity testing MAY be carried out to check the
+  **Service** hability to scale out or scale in, depending on its demand or workload.
 
 ### Documentation [SvcQC.Doc]