Vertical Shoot Position System (VSP)
Lyre System
Scott-Henry System
Geneva Double Curtain System (GD)
Smart Dyson System.
They all have their advantages and disadvantages.
The type of system you choose depends on your vine spacing,
variety of grape, vigor of the soil and personal preference. It is often
difficult to determine the potential vigor of a site and changing from
one system to another (retrofitting) has been done in many vineyards
successful. Your initial planting density will determine if it is
possible to retrofit the vineyard in the future.