SYSTEMS DEVELOPMENT ANALYSIS
WHY IS SYSTEM ANALYSIS IMPORTANT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Textual model
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Graphical model
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Mathematical model
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None of the above
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Detailed explanation-1: -The two most common forms of graphical model are directed graphical models and undirected graphical models, based on directed acylic graphs and undirected graphs, respectively.
Detailed explanation-2: -Graphical models aim to describe concisely the possibly complex interrelationships between a set of variables. Moreover, from the description key, properties can be read directly. The central idea is that each variable is represented by a node in a graph. Any pair of nodes may be joined by an edge.
Detailed explanation-3: -The two main types of graphical models are; Directed graphical models (Bayesian networks BNs) Undirected graphical models (Markov networks or Markov random elds MRFs)
Detailed explanation-4: -Graphical models allow us to define general message-passing algorithms that implement probabilistic inference efficiently. Thus we can answer queries like “What is p(A|C = c)?” without enumerating all settings of all variables in the model. Graphical models = statistics × graph theory × computer science.