Performance
The usefulness of the Suffolk consists mainly of the unprecedented growth rate and excellent musculature. 
The Suffolkram is ideal for the breeding mongrels. Using suffolkrammen is therefore the last years in the elevator. It appears that more and more sheep decide to allow a Suffolk rams dekram like to use them as at the end of the ride a higher net yields in the production of their lambs. From practical experience (including the Rijnlam program) has shown that the use of a Suffolkram counted per ewe few Euros advantage. The advantage is mainly due to a considerable saving on the cost of concentrate in the finishing stage due to the high growth rate of the progeny of Suffolk.
With good management, the lambs at the right time (ie when sexual maturity with an optimal fat) compared.
But it is always better!
Trials have shown that using Suffolk rams selected on the most important characteristics for meat rams, compared with "average" suffolkrammen an even higher income per lamb show. This additional benefit of up to 7.00 per ewe per year. This is due to the fact that by selecting on growth rate, muscle and fat of the ram above average properties, which he by the high heritability also 
his offspring feeding.
With this accurate breeding values in order to keep down is et in how the performance of each animal is due to genetic factors and the number of operating conditions (such as nutrition, hygiene, etc). This allows animals to identify genetically superior properties in terms of growth rate and muscularity can be. The value of the ram is expressed in an 'index', the higher the index, the better the ram.
Selecting a ram may not indicate its lottery. A ram with a high index will outperform a lower quoted ram.