Gomez Performance Satisfaction Index
U.S. Retail Web and Mobile Site Performance - Holiday 2011
How are the largest retailers performing over the Holiday 2011 period? How satisfied are users with their performance? How satisfied are users with web and mobile site performance?
The Gomez Performance Satisfaction Index (GPSI) answers these questions. The index is based on Compuware's
global network of testing locations that operate on the high bandwidth "Internet Backbone" and at the
"edge of the Internet" on local ISPs and mobile carriers to provide real-world web and mobile monitoring.
The Gomez Performance Satisfaction Index uses the Apdex methodology to estimate user satisfaction with performance. It takes into account user expectations of two-second page load time. It provides a view of user satisfaction based on synthetic testing on Compuware's global network.
To read an analysis of top retailers' 2011 Holiday season results, download the report here.
Every web and mobile test is assigned a value of:
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Satisfied = page response time of 2 seconds or less
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Tolerated = page response time of 2 to 8 seconds
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Frustrated = page response time of 8+ seconds or a failed test.
The Gomez Performance Satisfaction Index is calculated by comparing the ratio of Satisfied tests to half the Tolerating tests divided by the total of all tests. A score of 100 means that all tests in the sample fell into the Satisfied category. A score of 0 indicates that all tests fell into the Frustrated category.
The Gomez Performance Satisfaction Index categorizes the score range as follows:
- Excellent = 94 to 100
- Good = 85 to 93
- Fair = 70 to 84
- Poor = 50 to 69
- Unacceptable = 0 to 49
*Typical performance is comprised of test data collected for the same day and hour for October 2011.
For more information, see the FAQ Methodology Page. See all of our Gomez Benchmarks.
