How to Use ECM and MVal to Evaluate Dairy Cow Performance
ECM and MVal are both useful numbers, but they answer different questions for your dairy.Use ECM when you want to understand how cows are performing from a production standpoint. ECM helps compare cows, pens, or groups more fairly because it adjusts milk production for fat and protein. This is useful when reviewing fresh cows, checking pen performance, evaluating ration changes, or tracking herd production over time. Use MVal when you want to understand the dollar value of the milk being produced. MVal helps show which cows, pens, or groups are producing milk that is worth more under your current milk pricing. This is useful when reviewing your milk check, making culling or retention decisions, or comparing the financial impact of different groups.
A practical way to use both is to start with ECM, then look at MVal.
First, use ECM to ask: “Are my cows producing well?”
Then use MVal to ask: “Is that production turning into more value?”
For example, if a ration change increases ECM, cows are producing more energy-corrected milk. If MVal also increases, that change is likely helping both production and income. If ECM improves but MVal does not, the extra production may not be adding much value under your current milk pricing.
A simple way to look at is: