Each individual church regularly reviews and if needed, revises their Ordnung to handle changing circumstances. When Amish are faced with advances in technology and lifestyles of the outside world, they must decide how they are to deal with these changes. Over a long period of time, changes in Amish customs have developed across the whole spectrum of Amish communities and individual congregations. So this is why you see the different types of dress, styles of beards and different horses and buggies throughout the Amish country. Although customs may fluctuate from church to church they are still easily recognizable as “Amish customs". Traditions help the Amish preserve their identity and stay separate from the world.