Dairy shed efficiency calculator
If you're considering replacing or making major upgrades to your dairy, use this calculator to help you evaluate the size and type of dairy you need.
The milking performance calculator allows you to estimate herd milking duration and labour requirements, number of clusters, milking strategy and work routine.
How to use the calculator
Understanding the results
Suggested things to try
In a herringbone, if the model has estimated there is significant idle time, look to see how many operators it has calculated is required. If the number of operators are what you’d expect then try changing the post milking strategy, using MaxT will normally reduce idle time. Alternatively, it means more clusters can be handled. If there are more operators than you believe are required then try adjusting the number of clusters down, or it means that a faster work routine is required. This may mean additional technology, e.g. an automatic teat sprayer, is required to remove a task from the work routine.
Applying MaxT or increasing the ACR threshold will help reduce idle time.
Note that for MaxT in the herringbone the model assumes that the slowest 20% of cows will have milkings shortened. This may result in another operator being added, when in practice, it is normally not required because it also shortens the work routine as well so adjust this value down to remove the additional operator.
In the rotary, if using ACRs, then select a rotation time where about 15-20% of cows are going-around. However, then check the number of operators required. If reducing the rotation time has meant an additional cupper is required then consider whether cupping technique can be improved (reduce box e), or increase the rotation time slightly – as it is unlikely the increase in throughput will justify adding another person at cups on.
In the rotary, if selecting MaxT as an end-of-milking criteria then select a rotation time where 20% of cows will have their milkings shortened e.g. not allowed to go-around on a second rotation. The number will turn red if greater than 20%. As with the previous example, it may make sense to use a rotation time where less than 20% of the cows are truncated if it avoids needing another operator (for example at the afternoon milking).
Compare the total number of labour hours in each scenario you try.