Compass Schools, as the name suggest, use compass bearings and various feng shui calculations, but within this group, there are differences. Methods such as Eight Mansions or Eight House (Ba Zhi) are increasingly popular but very often misunderstood. This system uses the 8 trigrams to designate auspicious and inauspicious sections of a building, but having been greatly simplified, often causes great confusion.
Although useful when properly implemented, Eight House does not account for the effect of time on the energy within a building and is therefore not as dynamic as other methods. Flying Star Feng Shui or Xuan Kong Feng Shui is considered one of the most powerful and long lasting methods of feng shui. It uses a Luo Pan Or Chinese Compass to gain an accurate compass bearing of a building, together with complex calculations that supply specific information about the site. This degree of accuracy ensures the feng shui analysis is not only unique to that building but most importantly, that the effects of time are taken into account. The occupant's birth dates should also be used in conjunction with Flying Star to help identify the relationship between them and the energy pattern of their environment.