Optimal Dairy Systems - all year round calving KPI definitions

In the table below you will find an explanation of how the Optimal Dairy System enterprise level Key Performance Indicators are defined and calculated for all year round (AYR) calving systems.

Use our KPI benchmarking tool to enter your own figures, see how you perform and highlight focus areas in your business.

Key Performance IndicatorsDefinitions
Pregnancy rate (%) Pregnancy rate (also known as the % cows eligible for service conceived) is the percentage of cows eligible to be bred in any 21-day period (following a 50-day voluntary waiting period) that are served and hold in calf
Age at first calving (months) The average first calving age over a 12-month period is the addition of all ages of first calvings divided by the total number of first calvings
Total feed costs (pence/litre) All purchased feed costs including concentrates, youngstock feed (milk powder and concentrates), purchased forage, bulk/moist feeds and short-term (annual) grazing. This cost should be divided by the total milk produced
Average daily lifetime yield (litres/day) The average of total milk sold (litres) divided by age (in days from birth to culling) for cows leaving the herd during the year
Overheads (excluding rent and finance) as a proportion of dairy income (%) Overheads of the herd but excluding the rent and finance, as a proportion of the dairy related income from milk and livestock sales as well as TB compensation.
Genetic merit This is the percentile your average £PLI score falls into. For more information on how to obtain this value please refer to the 'how to get your genetic merit value' section below. 

* Fully milk recording herds can find their genetic merit score through our Herd Genetic Report - details can be found in the above online calculator. For non-milk recording herds, we've created this genetic merit tool so you can work out your percentile.