In setting production goals for any livestock enterprise, consider the economic return per acre rather than production per animal. This is a change from traditional thinking. Compare pounds produced per acre or per dollar invested rather than weaning weights or shipping weights. This type of analysis shows actual profitability more clearly.
While this article was directed at cattle I think most of us could expand this philosopy to include more than just one return on the investment. A mulitple-use management approach may give an even clearer picture of your returns. JMO