Enterprise KPI Definitions - Block Calving

Published 15 November 17

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 block calving systems:

Key Performance Indicators  Definitions
Cows calved within the first 6 weeks (%)

Number cows (excluding heifers) calved in 6 weeks ÷ Total number cows to calve × 100 =

6 Week Calving Rate (e.g. 90 Cows calved ÷ 100 cows in total × 100 = 90%)

Solids output per ha (Kg milk solids/hectare)

Milk Yield (kg/MS) ÷ total forage area used for the dairy herd = Milk Solids per ha

(e.g. ((1,000,000 litres × 1.03) x (4.6% Butterfat + 3.6% Protein))

÷ 75 ha = 1,126 kg MS/ha)

Milk output from forage (litres)

Milk yield per cow per year (total annual milk production divided by average number of cows in herd)

minus (kilos of concentrate use per cow per year ÷ 0.45)

(e.g. 1,000,000 litres ÷ 130 cows = 7,692 and 2,000kg concentrate ÷ 0.45 =

4,444, so 7,692 minus 4,444 = 3248 litres from forage)

Herd replacement rate (%)

The number of animals required to replace animals that have left the herd

(including voluntary culls and in-milk animals sold) during a defined period

(usually 12 months) expressed as a percentage of the average herd size during the same period

Overheads (fixed costs) as a proportion of income (output) (%)

Labour Costs (paid and a value of unpaid) + Power and Machinery (inc depreciation)

+ Administration (office costs, subscriptions, insurance + professional fees)

+ Property (water, property repairs and building depreciation but exclude rent and finance charges)

= Total overheads ÷ Income (milk and calf sales other livestock sales) x 100
e.g. £30,000 + £15,000 + £1,000 + £12,000 = £58,000 ÷ £120,000 x 100 = 48%

Genetic merit Definition to be defined following research work to be completed by the beginning of 2018

Farmers can access an online calculator to enter their own figures and see how they perform and highlight focus areas.