PURPOSE: This rule describes the procedures and rating values used in annual ratings of contractors.

1. (1) Statistical Analysis. Statistical analysis shall be used by the commission to compare performance by the contractors. Through standard deviation analysis, the commission shall determine how contractors relate to each other.

2. (2) Rating Categories. The following categories shall be used by the commission in determining the annual rating of each contractor based on the Contractor Performance Questionnaire and on the statistical analysis used by the commission: average, above average, below average, outstanding and unacceptable:

   1. (A) Average Rating. An average rating shall result if the contractor’s rating is within the range of the mean plus or minus one (1) standard deviation;
   2. (B) Above Average Rating. An above average rating shall result if the contractor’s rating is equal to or greater than the mean plus one (1) standard deviation but less than the mean plus two (2) standard deviations; 7 CSR 10-10
   3. (C) Outstanding Rating. An outstanding rating shall result if the contractor’s rating is equal to or greater than the mean plus two

3. (2) standard deviations;

   1. (D) Below Average Rating. A below average rating shall result if the contractor’s rating is equal to or less than the mean minus one (1) standard deviation but greater than the mean minus two (2) standard deviations; and
   2. (E) Unacceptable Rating. An unacceptable rating shall result if the contractor’s rating is equal to or less than the mean minus two (2) standard deviations.
4. (3) Overall and Category Ratings. On an annual basis, each contractor who has done work for the commission and which the commission has completed a Contractor Performance Questionnaire, shall be given a rating for each of the four (4) categories: quality of work, prosecution and progress, contract compliance and safety as well as receiving an overall rating which combines the ratings of all of the four (4) categories.

AUTHORITY: sections 226.020, 227.030 and 227.100, RSMo 1994 and 226.130, RSMo Supp. 1997.* Original rule filed Dec. 31, 1990, effective July 8, 1991. Amended: Filed April 13, 1994, effective Oct. 30, 1994. Amended: Filed June 12, 1996, effective Jan. 30, 1997. Emergency rescission and rule filed Nov. 20, 1997, effective Jan. 1, 1998, expired June 29, 1998. Rescinded and readopted: Filed Nov. 20, 1997, effective May 30, 1998. *Original authority: 226.020, RSMo 1939; 226.130, RSMo 1939, amended 1993, 1995; 227.030, RSMo 1939; 227.100, RSMo 1939, amended 1963, 1967, 1969.