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CYCLE TIME

The time lapse between the two ends of a temporal relationship is the cycle time of the process. In Figure 7.2, it is the time it took to bake the cookie—to turn Dough, the resource, into Cookie, the product, by baking it. Cycle time is a universal attribute of all temporal relationships (processes). Cycle time maps to the time-lapse domain; it distinguishes temporal relationships (processes) from nontemporal relationships. All processes must begin and end (except Sagas—see Box 7.2). The beginning moment and ending moment are events that occur at well defined times (even if the beginning and the end are unknown, they are still presumed to be distinct moments). Temporal beginnings and ends map to the date-time domain. The cycle time is a derived attribute; it is the elapsed time between the beginning and end of the temporal relationship (the process).

The work products of a process follow from its resources; they succeed the resources that made them. The process locates its products, relative to its resources, in time. Cycle Time is the temporal distance between the products and resources. Succession is a temporal relationship; in fact, it is a temporal polymorphism of the "locate relative to" relationship we discussed in the section on Location, Containment, and Incorporation in Chapter VI. Locate turns to succession when we add the flow of time to its meaning. We will discuss this in detail later in this chapter.


  

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