Quality of Service
● Refers to things such as...
● Perception of computer speed
Dropped connections
Unavailable websites
Network outages
Network congestion
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● Quality of Service (QoS) came from
telecommunications industry
● Call quality, lost connections, etc.
3
Quality of Service
● QoS matters because people's time matters
●Delays lead to frustration
Frustration leads to lowered subjective satisfaction
Can lead to increased frequency of errors as well
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● QoS matters because mistakes should be
avoided
● Quick performance vs. Low error rates
Sometimes we want a slower pace of working
Working too quickly may result in: data-entry errors,
learning less, lowered reading comprehension, etc.
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4
Quality of Service
● QoS more than system response time
● Application crashes
Unreliable network service
Malicious threats
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● QoS discussions and decisions
● Altering web pages to reduce bandwidth
requirements?
Reduce database or network queries?
Providing low and high resolution image options?