title: Code coverage Issue while deploying changeset to production
body: <p>I am trying to deploy change set which contains Custom fields, Apex classes and test classes from sandbox to production. While executing all test class in Sandbox, Overall Code coverage is 86%. But while deploying to production through change set, getting error message " Details: Average test coverage across all Apex Classes and Triggers is 27%, at least 75% test coverage is required." Please advice.</p>