OR FORUM—Little's Law as Viewed on Its 50th Anniversary

Fifty years ago, the author published a paper in Operations Research with the title, 'A proof for the queuing formula: L = λW'. Over the years, L = λW has become widely known as 'Little's Law.' It is a theorem in queuing theory that has become well known because of its theoretical and practical importance. Key developments in both areas are reported with emphasis on practice, collecting new material and searching for insights on use within operations management and computer architecture.