Collocations for reliability - noun

high
greater, greatest
poor
absolute
improved, increased
statistical

degree, level

assure (esp. AmE), ensure
Changes in design will ensure the quality and reliability of the printer.

enhance, improve, increase, maximize
reduce
assess, evaluate, judge
It is important to assess the reliability of the data.

demonstrate
measure
The reliability of the statistical estimates can be measured.

doubt, question
Many experts question the reliability of these figures.

improve, increase