Vennli
A flight scheduling and schedule-management portal delivered under subcontract for a U.S. Air Force program, covering sortie scheduling, crew and aircraft assignment, deconfliction, and routing.
Air operations scheduling that spreadsheets could not hold
Flight scheduling is a constraint problem wearing an administrative disguise. A single day's schedule has to reconcile aircraft availability, crew qualification and currency, duty-time limits, range and airspace windows, and maintenance downtime, and every one of those moves independently. Handled in spreadsheets and email, the reconciliation work grows faster than the flying does.
Because the customer was a federal one, accessibility was a delivery requirement rather than a preference. Section 508 governs federal ICT and incorporates WCAG Level AA as its technical standard, which meant conformance had to be designed into the interface rather than remediated after acceptance.
Model the domain first, then build the interface over it
We treated scheduling as a domain-modelling problem before it was a UI problem. The Python service owns the rules governing what may be scheduled against what, and why a given assignment is invalid, so the React portal never has to encode operational logic it can drift away from.
An explicit model of the schedulable entities and the relationships between them, so qualification, currency and availability constraints live in one place.
Server-side validation that surfaces conflicts as the schedule is built, rather than leaving schedulers to discover them downstream.
A scheduling surface designed around how schedulers actually work: dense views, keyboard-driven editing, and fast iteration on a day's plan.
Focus management, semantics and contrast handled once in shared components, so every screen inherited conformance instead of being audited into it later.
Delivered end to end across a one-year engagement
Rainier built the portal end to end over a twelve-month period of performance, from domain model through the scheduling interface and routing behaviour, working as a subcontractor to Vennli on the program.
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