The FIS revised the International Competition Rules for Nordic Combined, highlighted by the adaptation of the competition format that reduces the Ski Jumping event to one round and standardizes the Cross-Country race to 10 km.
As a result, the competition formats at the Olympic Winter Games 2010 in Vancouver were amended to consist of the following three competitions:
"Gunderson" indicates the race follows the Gundersen method: the winner of the jumping competition starts first, the second ranked starts next, etc. The start interval is the result of converting jump point differences into time differences. The start times are rounded to full seconds. Jump points are awarded for both jump style and jump distance.
The calculation is based on the appropriate meter and point value of the jump. If you really want to know the details, see Section 4 "Tables for Nordic Combined Cross Country" on page 77 of the 2008 Nordic Combined International Ski Competition Rules (the 2009 edition is not available).