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**. :** 0421100023\0025

**:** 34
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**:** 2011
**:** . . / . 34. .: , 2011. .5-29.

** :** , , , ,

** (.):** criteria importance theory, value function, reducing costs

**:** - - 25 - . , -, - , .

** (.):** According to the results of a computational experiment using decision rules of criteria importance theory can reduce 25 times the time spent on constructing a value function compared with a traditional approach of utility theory. For the case of two-variant and two-criterion choice the theorem is proved to quantify how many times criteria importance theory allows to reduce the proportion of cases when the value must be constructed.

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