when minimum efficient scale can be achieved with a small amount of production many companies can operate efficiently and compete in an industry such as restaurants however if it takes a high level of production output to achieve minimum efficient scale fewer companies can operate in the industry such as in the case of the telecommunications industry 
a healthy mes consists of numerous factors but those factors are continually shifting they have to be recalculated frequently to reflect the changes a business also has to keep adjusting its production levels to keep hitting the mark 