This description should be concise. If you are sure the SP does not apply in that industry, explain why it does not. No paragraphs of pointless prose. Be concise, but complete. Often your writeups will not even be a full page.
Airlines primarily exist to move passengers, which includes moving their baggage.
A secondary purpose is moving cargo, which are customer belongings that move without the customer. Other inputs include food and fuel, neither of which are supplied by the customer. Management should recognize that the airlines' two primary activities are moving customers and their belongings or preparing to move customers and their belongings, which should be emphasized to employees. Some employees may mistakenly think that the end goal is to move airplanes. Moving empty seats is not production, but is idle capacity.