Labor - Expected Margin ($/%) The Expected Margin (%EM) is the computed from the Expected Execution Budget (EB_E) and labor (LB) amount of a contract. It can differ from the Margin Objective (%MO) depending on how the project is going. Interpretation %EM >= %MO - The team will spent less money than expected. In such situations Execution Efficiency is >= 100%. %EM <= %MO -  The team will spent more money than expected. In such situations Execution Efficiency is <= 100%.