Datasheet

What Is the Big Deal About Testing? ■ 23
 Accessibility — A system is usable by as many people
as possible with modification.
Possible quality gates for the System Test are:
 All end-to-end processes can be executed.
 No severe defects exist.
Performance Test
The Performance Test helps us:
 Demonstrate that the system meets performance
criteria.
 Compare two systems to find which performs better.
 Measure which parts of the system or workload cause
the system to perform badly.
When troubleshooting, software engineers use tools such as
profilers to measure which parts of a device or software con-
tribute most to the poor performance or to establish through-
put levels (and thresholds) to maintain acceptable response
time.
When Performance testing begins at the inception of the devel-
opment project and extends through to deployment, you have
a better chance of catching defects early and thereby saving
money and time that would otherwise have to be budgeted to
fix problems down the line.
In Chapter 6, we focus on the different aspects of the Perfor-
mance Test and describe how it can be performed throughout
the product lifecycle.
The later a performance defect is detected, the
higher the cost of remediation.
MQM.book Page 23 Wednesday, May 7, 2008 11:29 AM