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In computer science, Actor modeling is a form of software modeling, which focuses on software actors. Actor modeling is most prominently used for the early modeling of requirements; through this it becomes possible to understand who the users and stakeholders of a system are and what their interests and needs are regarding that system. The increasing complexity of today’s systems makes it more appropriate to take this approach, instead of a traditional, more mechanically focused approach. When thinking along the dimensions of users and their needs, it is easier to comprehend what the system is designed to accomplish. This approach furthermore helps the users to define the requirements for the system. The approach of actor modeling is normally combined with the modeling of goals and tasks to give a better understanding of the situation the user is in. There are different modeling languages that support actor modeling; examples include i * and EEML. ==The Actor== The central entity of the Actor modeling – the actor itself – can be any kind of entity that is performing action(s). It may for example be a person, a department, or an organization. The goal of actor modeling is to understand the actor better. To do so, it is important to understand the actor, who he is and why he does what he does. The actor has attributes that define it: * The actor has goals, skills and responsibilities. * The actor performs tasks with a certain purpose in mind. * The actor depends on other actors, resources or tasks. The Actor concept was initially developed on a platform of multiple independent processors in a network. Implementation on a multiprocessor machine provides several basic concurrency features including encapsulation of parallel synchronization and serialized message processing, which allow higher level concurrent features such as fork/join, async/await, pipeline processing and others. The actor code encapsulates the threading and synchronization management so that a class derived from it can use threading techniques without having to implement the low level plumbing details. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Actor modeling」の詳細全文を読む スポンサード リンク
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