Western roll Osborn (1924), Walter Marty (1933), and Cornelius Johnson (1936). Johnson's record, (), was equaled on the same day by Dave Albritton, the first world record holder to use what we now call the straddle technique. At first, the straddle was viewed as just a variation of the Western roll, and indeed video of the 1936 Olympics shows Albritton using a conventional Western roll at lower heights. The straddle did not come to dominate the high jump until the mid-1950s, by which time it was recognized as a separate style. Walt Davis was the last Western roll jumper to hold the
Event partitioning The premise of event partitioning is that systems exist to respond to external events: identify what happens in the business environment that requires planned responses, then define and build systems to respond according to the rules of the business. In particular, a business system exists to service the requests of customers. A customer, in the jargon of the Unified Modeling Language (UML), is an "actor". The method has the following steps. The technique was extended with "non-event" events by Paul T. Ward and Stephen J. Mellor in "Structured Development for Real-Time Systems: Essential Modeling Techniques". Yourdon/DeMarco style of data dictionary