Electricity is linked to other infrastructure developments. These developments should anticipate future needs, and as accurately as possible, second guess the future to make the right decisions today. Supply should be ready at the right time; the volume of the electricity generated should be ready at the time it will be used. The quality of a future power station should be as close as possible to what the reality will look like when it is required. Electricity should also be affordable and the IRP need to answer these questions for the next 20 years.