Dear Ismail,
By definition; scenario is "a postulated sequence or development of events", while plan is "a detailed proposal for doing or achieving something" or "an intention or decision about what one is going to do". These two words are used as synonyms; however, in some contexts they may have different meanings.
In general business terms, Scenario is internally consistent verbal picture of a phenomenon, sequence of events, or situation, based on certain assumptions and factors (variables) chosen by its creator. Scenarios are used in estimating the probable effects of one or more variables, and are an integral part of situation analysis and long-range planning. The name comes from a script used in film/television industry that contains all the details on the appearance of characters, scenes, and the sequence of episodes.
Scenario analysis is a process of analyzing possible future events by considering alternative possible outcomes (sometimes called "alternative worlds"). Thus, scenario analysis, which is one of the main forms of projection, does not try to show one exact picture of the future
In other words, Scenario analysis is a method of predicting future values of portfolio investments based on potential events. It’s a method of estimating what will happen to portfolio values if a specific event happens or doesn’t happen. If this happens, then what?.
In short, scenario in urban planning is a vision one would like to accomplish over time, for which one needs plans. For different visions we need different plans.
Dear Ismail, do You mean to define the word 'scenario' or go deeper to the meaning?
I think, as the word can be used in different fields, it needs to be defined in its context. Could a person have a scenario of how to accomplish a task? That would be more like a plan. In order to present his scenario in a way that other people might understand it, it needs to be told, so it would be a tale or a narrative or at least needs telling to be understood. A tale or a narrative could be a linguistic representation of a scenario (there may be, for instance, a visual representation, too).
The swamp of ontology is deep, hopefully You have a context for Your scenario to keep Your head up!
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