IST420-Midterm Review Sheet

IST420-Midterm Review Sheet - Enterprise: an organization...

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Enterprise : an organization or business with a common name Enterprise Integration : the bringing together of people, processes, and information to work together in a harmonized way supported by the appropriate systems OR the bringing together of different organization to operate together in delivering a project, or product using an electronically enabled business environment Goal of Enterprise Integration : to provide timely and accurate exchange of consistent information b/w business functions to support strategic and tactical business goals in a manner that appears to be seamless *20 and 40% of labor costs are traced to storage or data *70% of code in corporate software is dedicate to moving data from system to system Issues critical to EI: -simplicity of legacy systems is inconsistent with demands of new options; data is specific to the application and not conducive to sharing; legacy systems were not designed with regard to interoperability, performance, security, and usability; ill defined scope; decisions are made w/o adequate analysis *Hardware = client, host; software = application, commun. (we decompose these by task partitioning and layering) Value of the architecture- what does it do for us?: Why the architecture?: capture inherent complexity; create linked, simplified subsystems; determine way of working/processing/storing and communicating Elements of the architecture: Decomposition -partitioning the system into individual subsystems that interact to realize higher system purposes Functionalit y-specialized capabilities assigned to each subsystem supporting the overall system purpose Interaction -how the subsystems communicate and cooperate to support the system purpose *For Data-Information-Knowledge-Wisdom to happen: Source for the data, application needed to present the data in a relevant way (convert it to information), a way to standardize the data to interpret data to make it information, experience is needed with the information for it to become knowledge, wisdom is perfection of that knowledge through experience and being able to apply it to different situations. *collect data, process it transform the data to become information, put information into context to become knowledge, combine information with experience to create wisdom Layering -partitioning the purposes so that adjacent layers accept from those below and feed into those above Importance = as long as inputs and outputs remain the same, you can change the individual layers w/o affecting outcome Principles = each layer is server to the layer above; interface determines how those layers above can access it; “here are the actions I can perform, don’t ask me how I do them”(can change lower layer w/o impacting functions of upper layer); each layer is a client to the layer below; each layer is permitted to interact only with adjacent layers How layers deal with data and information: Application layer assigns additional interpretation Middle layer presume some structure to the data
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IST420-Midterm Review Sheet - Enterprise: an organization...

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