The European Journal of Operational Research has marked the fiftieth anniversary of EURO with an invited review of the field’s first half-century (Martí, Sevaux, & Sörensen, 2025). A discipline that began as the pragmatic fallback when exact methods proved intractable now schedules, routes, and assigns across much of the infrastructure we rely on, from timetables and delivery networks to cloud workloads and energy systems.
We have watched a fair part of that span at close range, presenting tabu search at the EURO conference in Glasgow in 1994 and later refereeing for the journal in which the review now appears. A single 1986 paper by Fred Glover gave the field both its name and one of its central methods (Glover, 1986), and much of what followed reads as the working out of that contribution.
On the review’s own assessment, the methods are durable and ubiquitous, and the open question is discipline: honest benchmarking, measurement of whether celebrated components earn their complexity, and the integration of machine learning. We take up the conceptual core of the field — framework against algorithm and memory against metaphor — in a companion commentary, and we treat individual methods such as tabu search and neural networks in their own pieces. Here we simply mark the moment. Fifty years on, the techniques are everywhere, and the most interesting work is still ahead.