It is correct and usable in written English.
You can use it when discussing economic or business concepts related to the demand for goods or services. Example: The company's sales declined due to a decrease in both internal and external demand for their products.
"Since late 1998, the crown prince began responding to both internal and external demands by reining in the most ostentatious behavior of the princes, limiting their participation in business ventures," said Gwenn Okruhlik, a political scientist at the University of Arkansas who has written extensively about Saudi Arabia.
As companies install software applications to take over many of the tasks that employees now do—such as "running errands" to keep information moving they alter the balance between the internal and external demands on a company, an issue described in a book called "Harmony: Business, Technology & Life After Paperwork" by Arno Penzias, former boss of Bell Labs.
Norms (internal and external demands) were given the lowest scores in terms of a driving force.
This may come as a result of massive, internal and external demands for biofuels - amongst other agricultural uses such as soy cropping and cattle breeding - and as such, for fertile lands [31 35].
If top management is involved in gathering intelligence, disseminating this intelligence and being responsive to the needs of both internal and external demands, other staff members will also be encouraged to do so.
The growing internal and external demands for meat are responsible for local actions that increase livestock production, including grasslands to cropping system conversion for animal feedstock, or increasing grazing intensity, or a combination of both.
"It's easy to frame this as 'doing their job' versus 'taking a vacation,'" Congressional procedures expert Scott Meinke told me about a month ago, when internal and external demands to nix the August recess were heating up.
The informants further described strain due to conflicting work demands, in particular the conflict between internal and external demands.
Coping refers to the "thoughts and behaviors that people use to manage the internal and external demands of situations that are appraised as stressful" [ 1].
