Modular vs. Open: The Real Path to Best-of-Breed Airline Retailing

The quest for modular solutions in airline retailing is heating up, as carriers increasingly reject one-size-fits-all platforms in favour of specialised tools that excel in specific functions like offer creation, pricing, payment, and fulfilment. But not all paths to this model are created equal. While "modular" systems promise flexibility by breaking down operations into interchangeable parts, they often fall short without true openness – i.e., a design that welcomes diverse vendors and fosters competition. This distinction is more than semantic; it determines whether airlines unlock genuine innovation or risk subtle entrapment. In this piece, we'll compare the pros and cons of modular-only versus modular-and-open approaches, then outline how carriers can pursue the latter through structured partnerships and a reputable system integrator (SI). By doing so, airlines can deliver best-of-breed retailing that drives efficiency, revenue, and long-term agility.

Modular Systems: The Promise and the Pitfalls

Modular architectures represent a step forward from legacy passenger service systems (PSS), which have long burdened airlines with rigid, monolithic structures. In a modular setup, retailing functions are divided into discrete components – e.g., offer management as one module, order management as another – that can theoretically be updated or replaced independently. This allows for targeted improvements, such as swapping a sluggish payment gateway for a faster one, without ripping out the entire ecosystem.

The pros are compelling. Modularity de-risks platform migration by enabling phased rollouts: airlines can test new modules on a subset of routes or customers, minimising operational disruptions and spreading costs over time. For instance, a carrier might integrate a new ancillary merchandising tool while keeping core booking intact, achieving quick wins like an uplift in add-on sales through better personalisation. It also supports scalability, as modules can handle spikes in demand without overhauling infrastructure. In theory, this leads to faster time-to-market for features like real-time offer adjustments, boosting competitiveness.

But here's the catch: modularity alone can be a double-edged sword. Without openness, these systems often create hidden dependencies, where components are "modular" in name but tied to a single provider's ecosystem. Pros turn to cons when upgrades require proprietary interfaces, limiting choices and inflating costs. This pseudo-modularity stifles innovation, as carriers can't easily plug in cutting-edge tools from niche vendors, leading to stagnant capabilities. Worse, it undermines procurement leverage: in a market dominated by a few giants, airlines enter negotiations at a disadvantage, often locked into long-term contracts that prioritise the provider's roadmap over their own needs. The result? A system that's flexible on paper but rigid in practice, where "modular" becomes a marketing gloss over controlled silos.

Modular and Open Systems: Unlocking True Potential

Contrast this with modular-and-open systems, where openness is baked into the design philosophy. Components are not only swappable but accessible to any compatible vendor through standardised APIs. This approach amplifies modularity's benefits while addressing its shortcomings, creating a vibrant ecosystem that drives real progress.

The advantages are stark. Openness de-risks platform migration even further by standardising data flows, allowing seamless transitions between vendors. This reduces switchover times from months to weeks and cuts costs through competitive bidding. It opens the door to unexpected innovation, as airlines can experiment with emerging technologies like GenAI for narrative-driven offers or blockchain for secure settlements, without provider approval.

Moreover, it positions airlines strategically for stronger procurement and distribution freedom. Open systems level the playing field in RFPs, inviting bids from a broad pool of specialists and driving down prices through competition. This contrasts with single-provider modular setups where incumbents dictate terms. This freedom extends to distribution, empowering carriers to connect with new, diverse channels without intermediary fees or restrictions. The cons? Initial setup may require more upfront coordination to ensure API compliance, but this pales against the long-term gains in agility and cost control.

In a market where a handful of providers hold sway, modular-only risks perpetuating the status quo. On its face, it promises choice but only delivers control for the incumbent. Modular-and-open, however, challenges this dominance, fostering an environment where innovation thrives and airlines reclaim the reins.

Moving Forward: Implementing Modular and Open with an SI and Best-of-Breed Vendors

For airlines ready to embrace modular-and-open retailing, the journey starts with a structured approach fronted by a reputable SI. This partner acts as the neutral orchestrator, bridging vendors and ensuring the ecosystem's integrity from day one.

Step 1: Define Your Architecture Blueprint

Begin with a modular foundation aligned with IATA standards like NDC and ONE Order. Map all your future-state offer-order retailing functions, clearly articulating the capabilities of each and how you expect them to interoperate. For the latter, the SI you select will design the API layer, ensuring openness so modules can be swapped without recoding. This de-risks migration by starting small: pilot on a single function, like ancillaries, using anonymised data to validate integrations before scaling.

Step 2: Forge Vendor Partnerships with Openness in Mind

Craft RFPs that mandate open APIs and interoperability proofs, positioning you for stronger procurement. Demand clauses for future-proofing, like no penalties for vendor swaps. Assemble a best-of-breed consortium of modular systems all connected via the SI's hub. Joint workshops refine workflows, with agile testing to iron out kinks. This process also opens the door to unexpected innovation, as open designs invite trials with new vendors and/or modules.

Step 3: Manage the Program for Agility and Governance

Appoint the SI as program lead to oversee timelines, budgets, and risks – sometimes known as the “one throat to choke.” Use KPIs like integration speed and ROI (e.g., 15% ancillary uplift). Phased governance, like steering committees for reviews, ensures alignment, with rollback plans to de-risk go-lives. This management layer enhances distribution freedom, as open systems easily link to new channels without custom builds. Over time, it strengthens procurement by building a track record of successful swaps, giving leverage in renewals.

The beauty of this SI-fronted model is its balance: modularity provides the structure, openness the freedom. Airlines avoid the trap of "modular" systems that lock in providers through proprietary gates, instead creating ecosystems where competition drives value. As retailing evolves, those who prioritise both will lead, turning potential pitfalls into platforms for growth.