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Measuring Usability Homepage
Quantitative Usability, Statistics & Six Sigma by Jeff Sauro

Tags

Tag: Task Completion

Related Tags

Tag Name #
Confidence Intervals 438
Calculator 354
Six Sigma 320
Sample Size 317
Process Sigma 292
Discrete Data 258
Tasks 183
Completion Rate 180
Task Success 179
90 177
sample 2 169
Adjusted Wald 160
z score 154
test statistic 150
binomial 147
82 146
19683 144
error 137
Quality Level 125
t-test 112
likelihood ratio test 112
p-value 110
pearson 95
kappa 93
chi square 93
Proportion 86
critical z 85
Wilson 85
bmi 83
133 58
1292 56
1133 48
2
1

Pages

The following pages have the tag Task Completion associated with them. The number of users that have also tagged the page ' Task Completion ' is in parenthesis.

Calculating a Sigma Level from Task Success ( 221 )
Often the most reported measures of usability is task success. How does task success translate into a quality sigma value that can be compared to other reported sigma values?

Confidence Interval Calculator for a Completion Rate ( 199 )
If you've wanted to provide a confidence interval around a small sample completion rate but just didn't have time to do the math, this calculator does the work for you.

Calculating Sample Size for Task Completion (Discrete-Binary Method) ( 177 )

Restoring Confidence in Usability Results ( 165 )
Adding confidence intervals to completion rates in usability tests will temper both excessive skepticism and overstated usability findings. Confidence intervals make testing more efficient by quickly revealing unusable tasks with very small samples.

What is an Acceptable Level of Quality for Usability? ( 119 )
Is attaining Six Sigma a reasonable or even attainable goal for usability? A product's usability is the sum of several usability measures. Each Relative movement in your sigma value is good predictor of usability improvements.

Questions

No questions have the tag Task Completion associated with them.