When One Change Can Change Everything: Systems Theory

Operational excellence is about aligning strategy, processes, people, and culture so the organization operates with efficiency, effectiveness, and agility. In aviation, this means understanding how every part of the airline works together as an interconnected system.

Systems theory shows that a system’s behavior emerges from the interactions between its components, not just from the components themselves. A change in one area can ripple across the organization, producing effects that are both intended and unexpected. Recognizing system boundaries, feedback loops, and emergent behavior is essential for making improvements that are truly sustainable and effective.

Simple Illustration: Cabin Operations

Consider a cabin example: cleaning tray tables by shaking debris onto the floor. The tray tables are now clean—a visible improvement—but the floor becomes littered with crumbs, creating a new problem.

This demonstrates a core principle of systems thinking: solving one issue without considering the broader impact can inadvertently create others. The behavior of the “cabin cleanliness system” emerges not only from tray table cleaning but from the interaction of all cleaning activities, floor condition, and crew routines. A local change in one component triggers effects throughout the system.

Improving one part of a system without looking at the bigger picture can unintentionally create new problems elsewhere.

Maintenance Example: AMP Tasks and System Ripple Effects

Systems thinking is equally critical in engineering and maintenance. Imagine performing an Aircraft Maintenance Program (AMP) task more frequently than scheduled—such as replacing a filter or performing a lubrication check.

The immediate benefit is improved reliability and reduced risk of component failure. However, this adjustment can negatively affect the system:

• Supply chain: Increased demand for parts or consumables may strain inventory and require additional coordination with suppliers.

• Maintenance scheduling: More frequent tasks may extend man-hours or delay other scheduled maintenance.

• Operations: Aircraft availability could be affected, impacting flight schedules and fleet utilization.

• Costs: Labor and consumables increase, affecting overall efficiency.

This example illustrates how a change in one maintenance task affects supply chain, operations, and costs—highlighting the systemic impact of local decisions and the importance of a holistic perspective.

Understanding Feedback Loops

Feedback loops explain how changes in one part of a system influence the rest over time. They are a core concept in systems theory, helping predict and manage ripple effects.

Reinforcing Loops (Amplifying Feedback)

Occur when a change in one area strengthens its effects, amplifying consequences across the system.

Example: Performing AMP tasks more frequently improves component reliability. However, it also increases demand for spare parts and labor, putting strain on the supply chain and maintenance schedule. These pressures can lead to delays, overtime, and resource bottlenecks, which further amplify operational challenges.

Reinforcing loops can lead to runaway problems if not managed.

Balancing Loops (Stabilizing Feedback)

Occur when the system self-corrects to maintain stability or achieve a goal.

Example: Increased AMP task frequency creates higher demand for parts and labor. The maintenance planning team responds by prioritizing tasks, redistributing workload, or delaying non-critical work → supply chain and labor pressures are relieved → overall system performance stabilizes.

Balancing loops prevent reinforcing loops from spiraling out of control, keeping the system steady and sustainable.

The emergent behavior of the system—reliability, cost, aircraft availability—arises from the interaction of these loops. By understanding feedback loops, airlines can anticipate unintended consequences, plan resources effectively, and optimize system-wide performance.

Conclusion

A key benefit of systems thinking is designing improvements that optimize the system as a whole. Whether it’s cabin operations, maintenance, or leadership decisions, seeing the organization as an interconnected system ensures that improvements are meaningful and sustainable.

By thinking in systems and anticipating how changes propagate through reinforcing and balancing loops, airlines can make operational excellence more than a goal—it becomes a sustainable reality.

Interested in practical improvement tools for aviation?
The Lean & Kaizen Fundamentals course introduces core Lean concepts used in airlines to improve processes, reduce waste, and support operational excellence in day-to-day operations.