Which statement about practical capacity is true?

Which statement about practical capacity is true?

• A. It is the number of operations the airfield can accommodate with no more than some acceptable average delay; subjective measurement; always less than throughput capacity.
• B. It is the maximum number of operations with no delay.
• C. It is the same as throughput capacity.
• D. It is the total number of gates.

Answer: (A)

Practical capacity is about what an airfield can sustain under real operating conditions, allowing for an acceptable level of delay. In other words, it’s the rate of operations you can handle while keeping average delays within a threshold that stakeholders consider reasonable. This makes practical capacity inherently subjective because the acceptable delay depends on service standards, policy decisions, and operational priorities. It’s typically lower than throughput or theoretical capacity because real-world factors—variability in weather, coordination between gates and runways, maintenance, crew availability, and taxi times—reduce how fast operations can reliably proceed. For example, an airfield might theoretically handle 40 flights per hour, but to keep average delays from growing beyond an acceptable level, practical capacity might be around 32–34 flights per hour. The other statements miss this nuance: requiring zero delay describes an unrealistically ideal condition; equating practical capacity with throughput ignores the delays and constraints present in normal operations; and tying capacity to gates alone ignores runway, taxi, and scheduling bottlenecks that limit overall throughput.

Practical capacity is about what an airfield can sustain under real operating conditions, allowing for an acceptable level of delay. In other words, it’s the rate of operations you can handle while keeping average delays within a threshold that stakeholders consider reasonable. This makes practical capacity inherently subjective because the acceptable delay depends on service standards, policy decisions, and operational priorities. It’s typically lower than throughput or theoretical capacity because real-world factors—variability in weather, coordination between gates and runways, maintenance, crew availability, and taxi times—reduce how fast operations can reliably proceed. For example, an airfield might theoretically handle 40 flights per hour, but to keep average delays from growing beyond an acceptable level, practical capacity might be around 32–34 flights per hour. The other statements miss this nuance: requiring zero delay describes an unrealistically ideal condition; equating practical capacity with throughput ignores the delays and constraints present in normal operations; and tying capacity to gates alone ignores runway, taxi, and scheduling bottlenecks that limit overall throughput.