This excerpt taken from the MRO DEF 14A filed Mar 13, 2007.
Bonus Target Opportunities
Each year, the Committee establishes a bonus target amount for each Officer that is expressed as a percentage of his or her year-end base salary. In 2006, the bonus targets for the Officers were as follows:
The bonus targets are designed to be competitive with annual bonus targets for similar positions at peer companies and are based on compensation data provided by the Committees compensation consultant. Actual bonus payments may be above or below the target amount depending upon Marathon and individual performance for the year.